TYKOOL YTX4L-BS-Pro Lithium Motorcycle Battery - High Power

In this review of the TYKOOL YTX4L-BS-Pro lithium motorcycle battery, the bottom line is simple: this is a compact, lightweight replacement for small lead-acid powersports batteries for riders who prioritize strong cranking power and frequent starts. It is aimed at owners of dirt bikes, scooters, ATVs and similar machines who want a maintenance-free battery with fast charging and a built-in protection system. The most compelling reason to buy is the combination of high starting power and very low weight, which makes it handy for racing, trail use, or any application where shaving pounds and getting reliable starts matter.

Key Features

• Upgrade to Lithium: Replaces lead-acid batteries without acid or water and arrives fully charged, making installation straightforward and mess-free.
• High Starting Power: Delivers up to 220A starting power and 120A CCA, which gives noticeably stronger cranking than many OEM small batteries.
• Lightweight Design: Weighs about 1.32 pounds, roughly one third the weight of a comparable lead-acid battery, reducing overall vehicle weight.
• Built-in BMS: Integrated battery management protects against overcharge, over-discharge, short circuit and extreme temperatures for safer, more reliable operation.
• Fast Charging: Accepts a rapid charge and claims significantly faster recharge times than lead-acid alternatives, convenient for frequent use.
• Cross-Compatible: Fits and replaces several common small battery sizes like YTX4L-BS and YTZ5S-BS, making it a flexible swap for many models.

Who It's For

This battery is best for riders and owners of small motorcycles, dirt bikes, scooters, ATVs, UTVs and riding lawn tractors who need a lightweight, high-cranking option that reduces weight and delivers quick starts. It is particularly suited to those who value a maintenance-free solution with a protective BMS and frequent short trips where fast recharge is useful.

It is less suitable for users who need very large reserve capacity for long periods without charging or who cannot tolerate occasional reports of inconsistent charge level from other buyers; anyone relying on long deep discharge runs should consider a higher capacity model.

Pros & Cons

Pros

• Very light weight for easy handling and reduced vehicle mass.
• High starting amps for reliable cranking on small engines.
• Built-in BMS adds safety and cell balancing for longer usable life.
• Fast recharge times are convenient for frequent riders.

Cons

• Lower amp-hour capacity (2Ah) means limited reserve runtime compared with larger batteries.
• Some customers reported mixed experience with initial charge or longevity, so occasional variability exists.

Specifications

Our Verdict

The TYKOOL YTX4L-BS-Pro is a strong value for riders who need a lightweight, maintenance-free replacement with high cranking power and fast recharge. Its built-in BMS and broad compatibility make it a practical swap for many small powersports machines, though buyers should be aware of the modest 2Ah capacity and occasional mixed reports about initial charge. For those who prioritize starting performance and reduced weight, it offers good utility and longevity relative to lead-acid options.

Frequently Asked Questions

Will this replace a YTX4L-BS?
Yes, it is listed as a direct replacement for YTX4L-BS and several similar small battery sizes.

Does it need maintenance or water?
No, the lithium design requires no water, no activation, and no routine maintenance.

What protection does it include?
The battery includes a built-in BMS that protects against overcharge, over-discharge, overcurrent, short circuit and extreme temperatures.