KEMIMOTO Lithium Motorcycle Battery YTX5L-BS/YTX4L-BS - Lightweight

In this review of the KEMIMOTO Lithium Motorcycle Battery YTX5L-BS/YTX4L-BS, the bottom line is simple: this is a lightweight, high-discharge replacement battery best suited for small to mid-displacement powersports where weight savings and quick restart capability matter most. The reviewer found the pre-charged LiFePO4 chemistry and 200A cold cranking capability deliver reliable starting power right out of the box, and the included power display and pure copper terminals make installation and initial checks straightforward.

Key Features

• Pre-charged and ready: The battery arrives pre-charged with a power display so most vehicles can be started without a separate charger.
• High discharge terminals: Pure copper terminals support high current discharge for reliable cranking when you need a strong start.
• Adjustable fit: Two universal-fit EVA spacers and threaded-lug posts allow the battery to fit common YTX5L-BS and YTX4L-BS housings with tool-free terminal seating.
• Long cycle life: LiFePO4 chemistry promises far longer cycle life-up to 3000 cycles at deep discharge-so it can outlast comparable lead-acid options.
• Built-in protection: The BMS protects against extreme temperature and will cut out if conditions could damage the battery or connected electronics.
• Lightweight performance: The battery is roughly three times lighter than a lead-acid unit, making it useful for riders seeking weight reduction.

Who It's For

This battery is aimed at motorcycle, ATV, jet ski, and other powersports owners who need a compact, lightweight 12V replacement for small-displacement engines and value faster charging and long cycle life. It is especially useful for riders who want a reliable pre-charged battery that reduces overall vehicle weight and installs quickly with the supplied spacers and threaded terminals.

It is not the best choice for large-displacement starters or applications that require higher amp-hour capacity; the 2.5Ah rating means buyers should check their vehicle's required capacity and cranking amperage before switching. Those who need heavy-duty cranking or long standby time should look for higher-capacity units.

Pros & Cons

Pros

• Pre-charged out of the box with a visible power indicator for easy checks.
• Lightweight LiFePO4 design reduces bike mass and improves handling potential.
• Good conductivity from pure copper terminals and 200A CCA for reliable starts on compatible engines.
• Adjustable EVA spacers and threaded terminals simplify fitment and installation.

Cons

• 2.5Ah capacity may be insufficient for large-displacement engines or high-accessory loads; confirm match before buying.
• Some users report mixed long-term reliability, so real-world longevity may vary by use and charging habits.

Specifications

Brand	KEMIMOTO
Chemistry	LiFePO4 (Lithium)
Voltage	12V
Capacity	2.5Ah
Cold Cranking Amps	200A
Included items	Battery, 2 screws, 2 EVA spacers, user manual
Terminals	Pure copper threaded-lug posts

Our Verdict

The KEMIMOTO 12V LiFePO4 battery is a strong value for riders seeking a lightweight, pre-charged replacement for small to mid-size powersports machines; it provides immediate starting power, easy installation, and long cycle life compared with lead-acid. Confirm the 2.5Ah capacity and 200A CCA match your vehicle before purchasing to avoid compatibility problems.

Frequently Asked Questions

Is this battery ready to install out of the box?
Yes, it ships pre-charged and has a power display so most vehicles can be started without a separate charger.

Will this fit my YTX5L-BS battery box?
It includes two EVA spacers and threaded posts to adapt to common YTX5L-BS and YTX4L-BS housings, but always compare physical dimensions and terminal orientation before fitting.

Is the 2.5Ah capacity enough for big motorcycles?
The 2.5Ah rating is intended for smaller displacements; larger engines or heavy accessory loads should use a higher-capacity battery to ensure reliable starts and reserve power.