YTZ7S YTX5L-BS Lithium Motorcycle Battery LiFePO4 12V 4Ah - High

In this review the YTZ7S YTX5L-BS LiFePO4 battery is evaluated for riders and powersports owners who want a lightweight, high-cranking replacement for small lead-acid batteries. The bottom line: this battery is best for motorcycles, ATVs, UTVs and personal watercraft where quick starting and low weight matter most. Its key selling point is a high starting current and very low mass compared with lead-acid units, making it a practical upgrade when the physical size, terminal orientation and CCA range match the original battery.

Key Features

• Compact size: The battery measures 4.44 in x 2.76 in x 4.13 in, making it an easy fit for small motorcycle and powersports compartments when dimensions match.
• Lightweight: At about 1.98 lbs, it is roughly one third the weight of equivalent lead-acid batteries, which reduces vehicle weight and improves handling.
• High starting power: Rated for 280-350 CCA, it delivers strong cranking amps for rapid engine starts on cold or temperate mornings.
• Long cycle life: Using lithium iron phosphate chemistry, it offers markedly longer cycle life versus lead-acid, improving long-term value for frequent starters.
• Built-in protection: The automatic BMS provides maintenance-free operation, stable voltage, low self-discharge and enhanced safety compared with older lithium designs.
• Wide compatibility: Marketed as a replacement for multiple codes and compatible with many motorcycle and powersports brands when size and terminal orientation match.

Who It's For

This battery suits riders and powersports owners who prioritize weight savings and strong cranking power over initial low cost, such as sportbike riders, ATV and UTV users, and PWC owners who need reliable starts and reduced battery mass. It is especially useful for vehicles with limited battery space where the compact 113 x 70 x 105 mm footprint is required.

Those who should look elsewhere include owners who cannot confirm matching terminal position or exact dimensions, and users who need a battery with a guaranteed long-term hold charge in storage without periodic charging - some customers reported mixed long-term hold performance, so reserve this for applications where regular use or charging is expected.

Pros & Cons

Pros

• Very light weight compared with lead-acid equivalents, improving handling and fit in tight spaces.
• High cranking amps and fast cranking speed that reliably starts engines.
• Maintenance-free operation with built-in BMS and low self-discharge.
• Compact dimensions make it a straight replacement when size and terminal orientation match.

Cons

• Some customers report mixed long-term charge hold, so storage without charging may be a limitation for infrequent users.
• Must confirm terminal position (left negative, right positive) and physical size before purchase to ensure fit.

Specifications

Battery chemistry	Lithium Iron Phosphate (LiFePO4)
Voltage	12V
Capacity	4Ah
Cold cranking amps (CCA)	280-350 CCA
Dimensions	4.44 in x 2.76 in x 4.13 in (113 x 70 x 105 mm)
Weight	About 1.98 lbs
Terminals	M6 posts, Left Negative (-), Right Positive (+)

Our Verdict

The YTZ7S YTX5L-BS LiFePO4 battery is a strong option for riders and powersports owners who need a lightweight, compact replacement with high cranking power and maintenance-free operation. It offers real value when the dimensions and terminal orientation match the original battery, though buyers who store vehicles long-term without charging should be aware of mixed reports about charge retention.

Frequently Asked Questions

Will this battery fit my bike?
Measure your current battery and confirm the dimensions 4.44 in x 2.76 in x 4.13 in and terminal layout; if they match and CCA is similar it should fit.

Are the terminals positive on the right?
Yes, this unit uses left negative (-) and right positive (+) terminal positions with M6 posts.

Is this battery maintenance-free?
Yes, it includes an automatic BMS and is described as maintenance-free with low self-discharge.