A Yuasa battery chart helps you find replacements—if you know how to read it correctly. These charts decode model numbers, dimensions, and technical specs for seamless swaps.
Many assume battery replacement is guesswork, but Yuasa’s charts eliminate confusion. Matching voltage and capacity isn’t enough; terminal type or dimensions can derail your purchase.
Best Yuasa Battery Replacement Charts for Accurate Cross-Referencing
Yuasa YUAM620BH YTX20L-BS Maintenance-Free Battery
This high-performance AGM battery is a top choice for powersports applications. With 18Ah capacity and 310 CCA, it fits Honda, Yamaha, and Kawasaki models. Its sealed design prevents leaks, and the chart clearly lists compatible OEM part numbers for easy replacement.
Weize YTX14-BS Gel Battery
Ideal for ATVs and jet skis, this gel battery offers superior vibration resistance and deep-cycle capability. The Yuasa chart confirms it replaces common models like YB14L-A2. Its spill-proof design and long shelf life make it perfect for seasonal vehicles.
Yuasa NP7-12 12V 7Ah Sealed Lead Acid Battery
A versatile option for security systems and medical devices, this battery’s chart includes detailed dimension comparisons. It cross-references to popular industrial standards, ensuring compatibility with backup power systems from APC and Tripp Lite.
Pro Tip: Always verify physical dimensions and terminal positions against your original battery, even when the chart indicates compatibility. Some applications require exact case size matches.
Yuasa Battery Chart Components and Terminology
Yuasa Battery Specification Chart
| Model | Terminal Type | Voltage | Capacity (Ah) | Approx. Weight |
|---|---|---|---|---|
| YTZ7S | T2 | 12V | 6 Ah | 3.0 kg |
| YTX7L-BS | T2 | 12V | 7 Ah | 3.3 kg |
| YTX9-BS | T4 | 12V | 9 Ah | 4.0 kg |
| YB12A-A | T4 | 12V | 11.2 Ah | 4.3 kg |
| YB14-A2 | T4 | 12V | 14 Ah | 6.2 kg |
| YTX14-BS | T4 | 12V | 12 Ah | 4.5 kg |
| YTX20HL-BS | T4 | 12V | 18 Ah | 6.9 kg |
| GYZ20HL | T4 | 12V | 20 Ah | 7.4 kg |
| GYZ32HL | T4 | 12V | 32 Ah | 10.5 kg |
Battery Series Overview
| Series | Type | Features |
|---|---|---|
| YTZ Series | High Performance AGM | Compact, lightweight, high CCA |
| YTX Series | AGM Maintenance-Free | Reliable, sealed, vibration-resistant |
| GYZ Series | Elite AGM | Highest CCA, brass terminals, long lifespan |
| Yumicron | Conventional Lead-Acid | Extra plates for higher cranking power |
Yuasa battery charts contain critical technical specifications that determine compatibility. The most important elements include the battery group size, voltage, capacity (Ah), cold cranking amps (CCA), and terminal configuration.
Group size refers to the physical dimensions and terminal placement, which must match your application’s battery box. For example, a YTX14-BS indicates a specific case size (YTX) with 14 amp-hours capacity and BS terminal orientation.
Decoding the Model Number System
Yuasa’s alphanumeric codes follow a logical pattern that reveals key features:
- Prefix letters (YTX, YB, NP) indicate the battery series and chemistry
- Middle numbers show capacity in amp-hours (14 in YTX14 = 14Ah)
- Suffix letters denote terminal type (BS = top-mounted, opposite polarity from AS)
For industrial batteries like the NP7-12, “NP” means sealed lead-acid, “7” indicates 7Ah capacity, and “12” represents 12 volts.
Real-World Application Example
When replacing a motorcycle battery, you might find your original is a YUAM620BH. The chart reveals this is part of the YTX series (high-performance AGM), with 20Ah capacity (20), L terminals (L), and -BS configuration. The chart would show equivalent models from other brands, such as a Deka ETX20L matching these specs.
Common Pitfall: Many users mistakenly believe voltage and CCA are the only important factors. However, terminal placement differences (like BS vs. AS) can make physically incompatible batteries appear electrically equivalent on paper. Always verify all chart specifications against your original unit.
Technical Specifications Explained
The capacity (Ah) measures how long the battery can deliver power, crucial for applications like trolling motors. CCA indicates starting power for engines, vital in cold climates.
For a marine battery like the YUAM620BH, both specs matter – high CCA for reliable starts and ample Ah for electronics. The chart helps balance these needs when selecting replacements.
Yuasa’s charts often include dimensional drawings with millimeter precision. A 1mm difference in length can prevent installation in tight motorcycle battery trays. The chart’s mechanical data prevents this frustration by providing length (L), width (W), and height (H) for every model.
Step-by-Step Guide to Using Yuasa Battery Charts for Replacement Selection
Locating and Accessing the Correct Chart
Yuasa provides different charts for various product lines – powersports, industrial, and automotive. Always use the chart specific to your battery type.
For motorcycle batteries, download the “Powersports Battery Application Guide” from Yuasa’s official website. Industrial users need the “Stationary Battery Cross-Reference” document. These PDFs contain searchable tables organized by application and model number.
Five Critical Matching Criteria
When cross-referencing, verify these exact specifications:
- Voltage: Must match exactly (12V can’t replace 6V systems)
- Physical dimensions: Check LxWxH against your battery compartment
- Terminal type and position: Top-post vs. side-post, polarity orientation
- Capacity (Ah): Should meet or exceed original specifications
- Technology type: AGM, gel, or flooded – affects charging requirements
For example, replacing a YTX20L-BS requires finding all these exact matches in the chart.
Practical Application Example
Imagine your Kawasaki Ninja 650 has a dead YUAM620BH battery. The chart shows this corresponds to group size YTX14L-BS. Searching this group reveals compatible alternatives:
- Yuasa YTX14-BS (conventional lead-acid)
- YTX14L-BS (maintenance-free AGM)
- Competitor models like MotoBatt MBTX14U
The chart indicates all share identical dimensions (150x87x140mm) and terminal configuration, but note the CCA ratings vary between models.
Troubleshooting Common Issues
When matches aren’t perfect, the chart’s “Replacement Notes” column provides solutions. For tight spaces, look for “slim line” variants. If terminals don’t align, the chart may recommend terminal adapters. Some charts include modification instructions for minor fitment issues – like trimming battery box lips by 2-3mm for certain ATV applications.
Pro Tip: Always check the “Replaces OEM Part Numbers” section. Your equipment might show a Kawasaki part number (like KYB520L), which the chart cross-references to Yuasa’s equivalent (YTX14L-BS). This bypasses the need to physically measure your old battery.
Advanced Interpretation of Yuasa Battery Specifications and Performance Data
Understanding Performance Curves and Temperature Effects
Yuasa charts include critical performance data that goes beyond basic specifications. The discharge curves show how capacity (Ah) decreases under different load conditions. For example, a YTX20L-BS battery shows:
- 20Ah capacity at 20-hour discharge rate (1A load)
- Only 18Ah at 10-hour rate (2A load)
- Drops to 15Ah at 1-hour rate (20A load)
This explains why a battery that “should last” 20 hours might only power your trolling motor for 8 hours under heavy current draw.
| Temperature Range | Capacity Percentage | CCA Performance |
|---|---|---|
| 30°C (86°F) | 105% | 98% |
| 20°C (68°F) | 100% | 100% |
| 0°C (32°F) | 85% | 90% |
| -20°C (-4°F) | 65% | 75% |
Cycle Life vs. Depth of Discharge
Deep-cycle batteries like the YIX30L-BS show dramatically different lifespans based on usage patterns:
- 500 cycles at 100% depth of discharge
- 1,200 cycles at 50% discharge
- 3,000+ cycles at 20% discharge
This explains why golf cart batteries last longer when recharged after partial use rather than complete depletion.
Advanced Cross-Referencing Techniques
When exact matches aren’t available, professionals use these chart interpretation methods:
- Voltage stacking: Two 6V GC2 batteries (like Yuasa EN400-6) can replace 12V systems when wired in series
- Capacity combining: Parallel connections of two YB14L-A2 batteries doubles amp-hour capacity for solar applications
- Terminal adaptation: The chart indicates when SAE to screw terminal converters can solve compatibility issues
Expert Insight: Always check the chart’s “Not Recommended For” section. Some physically compatible batteries like the YTX7L-BS lack sufficient CCA for large displacement engines, despite fitting the battery box. The chart flags these potential mismatches.
Specialized Applications and Industry-Specific Yuasa Battery Selection
Marine and Powersports Considerations
Yuasa’s marine battery charts include unique specifications that standard automotive charts omit. For example, the YUAM620BH marine battery features:
- Dual-purpose design: Combines high CCA (310) for starting with deep-cycle capability (18Ah)
- Vibration resistance: Specially designed grids withstand constant wave impacts
- Corrosion protection: Marine-grade terminals resist saltwater exposure
The chart indicates which models meet ABYC (American Boat and Yacht Council) standards for different vessel types.
Industrial and UPS System Requirements
When selecting batteries for backup power systems, Yuasa’s NP series charts highlight critical factors:
- Float service life: NP7-12 shows 5-7 year lifespan at 25°C continuous float charge
- Cycle service life: 300+ cycles at 80% depth of discharge for solar applications
- Terminal torque specs: Precise 0.56-0.79 Nm for NP series to prevent connection failures
The charts include detailed recharge rate tables showing optimal voltage settings for different applications.
High-Temperature Environment Solutions
Yuasa’s HT (High Temperature) series batteries like the YTZ14S-HT require special chart interpretation:
- Standard batteries lose 50% life expectancy at 30°C (86°F)
- HT versions maintain full specifications up to 45°C (113°F)
- Charts include temperature compensation factors for charging
The application notes specify when HT batteries are required for engine compartments or industrial equipment.
Safety and Compliance Markings
Professional users must understand the certification symbols in Yuasa charts:
| Symbol | Meaning | Application Requirement |
|---|---|---|
| UL | UL Listed | Mandatory for US commercial installations |
| CE | EU Compliance | Required for European equipment |
| DOT | Transport Approved | Necessary for shipped batteries |
Pro Tip: Always check the chart’s “Special Applications” section. Some Yuasa batteries like the GYZ series are specifically designed for aviation ground support equipment and have unique venting requirements not found in standard models.
Long-Term Performance Optimization and Lifecycle Management
Battery Aging Characteristics and Predictive Replacement
Yuasa battery charts include often-overlooked aging data critical for preventive maintenance. The performance degradation curves show:
- Capacity fade: AGM batteries like YTX14L-BS typically lose 20% capacity after 500 cycles
- Internal resistance growth: Increases 30-40% over 3 years, affecting charging efficiency
- Self-discharge rates: Varies from 1-3% monthly for sealed models versus 5-8% for flooded
The charts provide replacement indicators showing when capacity drops below 80% of rated specifications.
| Maintenance Practice | Frequency | Impact on Lifespan |
|---|---|---|
| Equalization Charging | Every 10 cycles (flooded) | Extends life 15-20% |
| Terminal Cleaning | Bi-annually | Prevents 30% resistance increase |
| State-of-Charge Checks | Monthly (storage) | Prevents sulfation damage |
Cost-Per-Cycle Analysis by Battery Type
Advanced chart interpretation reveals true long-term value:
- Conventional lead-acid: $0.15/cycle but shorter lifespan (300 cycles)
- AGM technology: $0.22/cycle with 500+ cycle capability
- Gel cells: $0.30/cycle but superior deep-cycle performance
The charts include energy efficiency ratings (85-92% for AGM vs. 75-85% for flooded) affecting operational costs.
Environmental Factors and Storage Considerations
Yuasa’s technical charts specify:
- Temperature compensation: Charging voltage adjustments (-3mV/°C/cell for AGM)
- Storage guidelines: NP series retains 90% charge after 6 months at 20°C
- Recycling codes: Identifies components meeting EU Battery Directive 2006/66/EC
Proper interpretation prevents capacity loss during seasonal equipment storage.
Emerging Technologies and Future Trends
Recent chart updates reflect industry shifts:
- Carbon-enhanced models: YTX14L-BS-C shows 30% longer cycle life
- Smart battery integration: New QR codes link to digital maintenance records
- Fast-charge compatibility: Special symbols indicate which models support 2C charging rates
These innovations are gradually being incorporated across Yuasa’s product lines.
Expert Recommendation: Always check the chart’s revision date – Yuasa updates technical data annually based on field performance data. A 2023 YTX14L-BS may have different specifications than a 2018 version of the same model number.
System Integration and Performance Optimization Techniques
Charging System Compatibility Analysis
Yuasa battery charts contain vital charging parameters often overlooked during replacement. Each model specifies:
- Absorption voltage: Ranges from 14.4-14.8V for AGM batteries like YTX14L-BS
- Float voltage: Typically 13.5-13.8V for maintenance-free operation
- Maximum charge current: 30% of Ah rating for standard charging (e.g., 4.2A for YTX14)
Mismatched charging systems can reduce battery life by up to 60%, making these chart details critical.
Parallel and Series Configuration Guidelines
When combining multiple batteries, the charts provide specific wiring requirements:
- Voltage matching: Series connections require identical Ah ratings (two YTX20L-BS for 24V systems)
- Age matching: Never mix batteries with more than 6 months’ age difference
- Interconnect sizing: Charts specify minimum cable gauges based on current draw
The NP series industrial batteries include special balancing requirements for bank configurations.
Load Profile Matching Methodology
Advanced chart interpretation involves analyzing three load characteristics:
| Load Type | Battery Selection Criteria | Example Match |
|---|---|---|
| High surge (starters) | Prioritize CCA rating | YTX20L-BS (310 CCA) |
| Continuous (trolling) | Focus on Ah capacity | YUAM620BH (20Ah) |
| Intermittent (UPS) | Cycle life paramount | NP7-12 (300+ cycles) |
Vibration and Mounting Considerations
Industrial applications require careful attention to the chart’s mechanical specifications:
- Shock resistance: YB14L-A2 withstands 5G vibration vs. 3G for standard models
- Orientation limits: Most AGM batteries allow any-angle mounting except inverted
- Bracket requirements: Charts specify clamp torque values (typically 4-6 Nm)
These details prevent premature failure in demanding environments like construction equipment.
Professional Insight: Always cross-reference the “Incompatible Chargers” section in Yuasa charts. Some high-frequency chargers can damage AGM batteries despite matching voltage specifications. The charts list approved charger models by manufacturer.
Comprehensive System Validation and Performance Assurance
Post-Installation Verification Protocol
After battery replacement using Yuasa charts, implement this validation process:
- Voltage stability test: Measure under load (should stay above 10.5V for 12V systems)
- Capacity verification: Perform 20-hour discharge test for Ah validation
- Terminal temperature check: Should not exceed 50°C during heavy loads
The charts provide acceptable performance ranges for each model – for example, YTX14L-BS should maintain 12.6V after 12 hours rest post-charging.
| Test Parameter | Acceptable Range | Measurement Technique |
|---|---|---|
| Internal Resistance | 4-6 mΩ (new AGM) | AC impedance at 1kHz |
| Charge Acceptance | >90% at 25°C | Constant voltage test |
| Self-Discharge | <3%/month | 72-hour open circuit test |
Advanced Performance Monitoring Techniques
Yuasa charts enable predictive maintenance through:
- Trend analysis: Compare current CCA to chart’s baseline specifications
- Specific gravity tracking: For flooded batteries, monitor electrolyte density
- Impedance spectroscopy: Advanced method to detect sulfation early
The NP series industrial batteries include detailed end-of-life indicators in their technical charts.
Risk Mitigation Strategies
Critical failure prevention measures from Yuasa’s application notes:
- Thermal runaway prevention: Maximum ambient temperature limits for each series
- Ventilation requirements: Cubic feet per minute calculations for battery rooms
- Corrosion control: Approved terminal protectants for marine environments
These specifications vary significantly between YTX (powersports) and NP (industrial) series.
Quality Assurance Documentation
Professional installations require:
- Batch code verification: Cross-reference with Yuasa’s manufacturing date chart
- First article inspection: Validate physical dimensions against chart specifications
- Performance baselining: Document initial capacity and internal resistance
Yuasa provides downloadable inspection templates that align with their battery chart data.
Expert Recommendation: Implement a quarterly validation cycle comparing your battery’s actual performance to the chart’s published specifications. This proactive approach identifies degradation patterns before failure occurs, particularly important for critical power systems.
Conclusion
Mastering Yuasa battery charts transforms battery replacement from guesswork to precision. You’ve learned to decode model numbers, match specifications, and verify physical compatibility.
The charts reveal critical details often overlooked – terminal configurations, temperature ratings, and charging requirements. These factors determine long-term performance and safety.
Remember to check both electrical and mechanical specifications. A battery that seems perfect electrically might fail physically in your application.
Take action today: Download the correct Yuasa chart for your needs. Cross-reference your existing battery before purchasing. This simple step saves time, money, and frustration while ensuring optimal performance.
Frequently Asked Questions About Using Yuasa Battery Charts
What information does a Yuasa battery chart provide?
Yuasa battery charts contain comprehensive specifications including dimensions, terminal types, voltage, capacity (Ah), cold cranking amps (CCA), and weight. They also list compatible OEM part numbers and equivalent models from other manufacturers. The charts include technical data like charge rates and temperature ranges for different applications.
Advanced charts show performance curves, cycle life expectations, and replacement notes. For example, the YTX14-BS chart indicates it replaces Honda part number 31500-MFJ-D01 and specifies exact case dimensions of 150x87x140mm.
How do I find the correct Yuasa battery chart for my application?
Visit Yuasa’s official website and select the chart matching your battery type (powersports, industrial, or automotive). Use the search function with your current battery’s model number if known. For vehicles, have your make, model, and year ready to reference the application guide.
If uncertain, download the comprehensive “Powersports Battery Application Guide” for motorcycles/ATVs or “Industrial Battery Cross-Reference” for equipment batteries. These PDFs contain searchable tables organized by equipment manufacturer.
Can I use a higher CCA battery than specified in the chart?
Generally yes, if physical dimensions and terminal configuration match. Higher CCA provides better cold-weather performance without harm. However, excessively high CCA may indicate different internal construction less suited for deep-cycle applications like trolling motors.
The chart’s “Replacement Notes” section indicates when CCA upgrades are recommended. For example, the YTX20L-BS (310 CCA) often replaces 270 CCA batteries in high-compression engines.
Why won’t a battery that matches the chart specifications fit my vehicle?
Common issues include overlooking terminal position (BS vs AS configuration) or case style variations. Some applications require “slim line” versions despite matching capacity. Always verify the exact length, width, and height in millimeters.
The chart’s dimensional drawings include critical details like terminal offset measurements. A 5mm difference in terminal placement can prevent connection in tight spaces.
How do I interpret the cycle life data in Yuasa charts?
Cycle life indicates how many complete charge/discharge cycles the battery can handle before capacity drops to 80%. AGM batteries like YTX14L-BS typically show 500 cycles at 50% depth of discharge (DOD).
Industrial charts include detailed tables showing cycle life at different DOD levels. For example, NP7-12 batteries provide 1200 cycles at 30% DOD but only 300 at 80% DOD.
What do the different terminal type codes mean in the chart?
Terminal codes indicate configuration: “BS” means top-post with positive on right, “AS” is positive on left. “L” indicates automotive-style side posts. “T” terminals are threaded studs for industrial applications.
The chart includes diagrams showing exact terminal measurements. For example, YTX20L-BS uses 6mm diameter top posts spaced 132mm apart, while NP7-12 has M5 threaded terminals.
How often does Yuasa update their battery charts?
Yuasa revises charts annually to reflect product changes and new compatibility data. Major updates occur when new battery series launch or when specifications change significantly.
Always check the revision date in the chart footer. A 2024 YTX14-BS may have different specs than a 2020 version. Current charts are available for download on Yuasa’s website.
Can I use Yuasa charts to cross-reference other brand batteries?
Yes, the charts list equivalent models from major brands like Deka, MotoBatt, and Interstate. However, always verify specifications match exactly – some “equivalent” batteries may differ in case size or terminal type.
The cross-reference section indicates which models are direct replacements versus “similar” batteries requiring verification. For example, the chart might show Deka ETX14 as identical but list MotoBatt MBTX14U as needing dimensional confirmation.