YTX7A-BS Lithium Motorcycle Battery 12.8V 4Ah 350CCA - Lightweight

In this review of the YTX7A-BS Lithium Motorcycle Battery, the bottom line is simple: this compact 12.8V 4Ah battery is for riders and powersports owners who want a lightweight, high-cranking replacement that makes starting faster and reduces weight. The reviewer found it particularly useful for motorcycles, scooters, ATVs and small generators where size, terminal layout and reliable cold cranking are important. The strongest single reason to buy is the combination of high starting current and very low weight compared with a lead-acid unit.

Key Features

• Compact dimensions: At 5.9 x 3.42 x 3.66 in the battery fits tight battery boxes and many OEM locations without modification.
• High starting power: The 350 CCA rating provides fast cranking that many customers say starts engines instantly.
• Smart BMS and maintenance-free: Built-in automatic battery management protects cells and eliminates the need for water or acid maintenance.
• Multiple terminal options: M6 pure copper posts and multi-terminal configuration allow front, side, top and female mounting for easier installation.
• Lightweight portability: Weighing about 1.76 pounds, it is roughly one third the weight of equivalent lead-acid batteries, making handling and installation much easier.
• Safer chemistry: Lithium iron phosphate construction reduces flammability and self-discharge compared with some traditional lithium types.

Who It's For

This battery suits motorcycle riders, scooter owners, ATV and UTV users, and small-generator owners who need a compact, lightweight replacement with strong cranking ability and a clear top-mounted power display. It is also a good option where corrosion resistance and maintenance-free operation matter, such as salt-prone coastal riding or winter storage.

It is not the best choice for users who cannot confirm fitment or terminal orientation; you should measure your old battery and match model, size and terminal positions before buying. If long-term charge-holding is critical for infrequent use and you need guaranteed years of service under heavy parasitic draw, consider verifying real-world holdover expectations first.

Pros & Cons

Pros

• Very light weight reduces overall vehicle mass and eases installation.
• Strong cranking performance with 350 CCA for quick engine starts.
• Built-in BMS and clear top power/voltage display simplify monitoring and maintenance.
• Pure copper M6 terminals deliver reliable conductivity and flexible mounting options.

Cons

• Some customers reported mixed long-term charge retention, so reserve charging practices are recommended.
• Must confirm exact model, size and terminal orientation before purchase to ensure fit.

Specifications

Model	YTX7A-BS / replacement for YTZ10S
Nominal voltage	12.8V
Capacity	4Ah
Cold cranking amps	350 CCA
Dimensions	5.9 x 3.42 x 3.66 in (L x W x H)
Weight	1.76 pounds
Terminals	M6 pure copper posts, + -

Our Verdict

The YTX7A-BS Lithium Motorcycle Battery is a practical, value-minded upgrade for riders and small powersports owners who prioritize weight savings and strong starting power. It delivers high cranking amps, a handy power display and maintenance-free operation, making it a good fit for regular riders and anyone replacing a small lead-acid battery - provided you verify size and terminal orientation ahead of installation.

Frequently Asked Questions

Will this battery fit my bike?
Measure your old battery and confirm model, size and terminal positions; the compact 5.9 x 3.42 x 3.66 in dimensions match many YTX7A-BS applications.

Is it maintenance free?
Yes, the built-in automatic BMS and lithium iron phosphate chemistry make it maintenance-free with no acid or water handling required.

What if the bike does not start?
Check that the battery connection is secure and the power indicator shows sufficient voltage, then try starting again; also verify cranking current requirements match the 350 CCA rating.