TYKOOL YTX9-BS Lithium LiFePO4 Motorcycle Battery - Lightweight High

In this review of the TYKOOL YTX9-BS lithium motorcycle battery, the bottom line is simple: it is a compact, lightweight replacement for small lead acid batteries that delivers noticeably stronger starts and much longer life. For riders who want a fast-cranking, low-weight battery that installs in minutes and requires no maintenance, this battery stands out. The reviewer found the battery especially useful for scooters, ATVs and a range of small-displacement motorcycles because of its 240 CCA, integrated BMS and ready-to-install charge out of the box.

Key Features

• Higher starting power: Rated 240 CCA, it provides roughly 2X the useful cranking amps compared with comparable lead acid units, helping cold or high-compression engines spin over more readily.
• Long service life: The LiFePO4 chemistry and spec of about 2500 cycles means far fewer replacements versus typical lead acid batteries, lowering long-term ownership cost.
• Lightweight compact size: At about 2.27 pounds and small dimensions, it trims vehicle weight and fits where YTX9-BS and similar sizes are used.
• Maintenance free: Ships fully charged with no acid or water required, so it is ready to install without activation or ongoing upkeep.
• Built-in protection: The integrated Battery Management System protects against overcharge, overdischarge, overcurrent and short circuits, improving reliability.
• Fast charge capability: Accepts 12V 1A-3A charging and recharges much faster than lead acid batteries for quick turnarounds.

Who It's For

This battery is best for riders of scooters, lightweight motorcycles, ATVs and UTVs who prioritize weight savings, fast starting and long cycle life. It is a solid choice for owners of models listed in the fitment notes such as small BMW, Honda, Kawasaki, KTM, Royal Enfield and Polaris 150cc machines where the YTX9-BS size is used.

Those who rely on long shelf storage without charging, or who need high-capacity house batteries for heavy accessories, should consider other options; the 4Ah nominal capacity and focused cranking role make this battery ideal for starting and light electrical loads, not long accessory runtime.

Pros & Cons

Pros

• Very light and compact, making installation and fitment easy in tight trays.
• Strong cranking performance for its size, helping cold or high-compression engines start more reliably.
• Long cycle life compared to lead acid, which reduces replacement frequency and cost over time.
• Maintenance free with a smart BMS for added safety and cell balancing.

Cons

• Lower amp-hour capacity (12V, 4Ah) limits running time for high-draw accessories without an auxiliary power source.
• Mixed reports on long-term battery life in real-world use suggest monitoring SOC and usage patterns for optimal longevity.

Specifications

Brand	TYKOOL
Model	LFP9-BS-STD (YTX9-BS replacement)
Battery type	Lithium LiFePO4
Voltage & Capacity	12V, 4Ah
Rated Cold Cranking Amps	240 A
Dimensions	5.9 in x 3.43 in x 3.66 in
Weight	2.27 pounds

Our Verdict

The TYKOOL YTX9-BS is a practical, value-oriented lithium swap for riders who want lighter weight, faster starts and long cycle life without maintenance. It is especially strong as a direct replacement in scooters, small motorcycles and compact ATVs where the YTX9-BS size fits; buyers who need long accessory runtime should pair it with auxiliary power or choose a higher capacity unit.

Frequently Asked Questions

Will this battery fit my YTX9-BS tray?
It is designed as a direct replacement for YTX9-BS and similar sizes, and the compact dimensions and polarity match typical trays for those models.

How long does the battery hold a charge in storage?
It ships fully charged and the LiFePO4 chemistry holds charge well, but for long-term storage periodic top-ups are recommended to preserve battery life.

Can I charge this with a regular 12V motorcycle charger?
Yes, it accepts 12V charging at 1A to 3A and charges much faster than a lead acid battery; avoid chargers that are designed only for flooded lead acid without LiFePO4 compatibility.