TYKOOL LiFePO4 Motorcycle Battery YTX9-BS-PRO 300 CCA — 2.1 lb, 2000+ Cycle Life

TYKOOL YTX9-BS-PRO is a lightweight LiFePO4 replacement motorcycle battery delivering 300 CCA, a clear digital state-of-charge readout, and up to 2,000+ cycles for long-lasting starting power.

This PRO-grade battery swaps into YTX9-BS/GTX9-BS applications and is engineered for modern powersports machines that demand reliable cranking and stable voltage under load. At just 2.1 lbs and measuring 150×87×105 mm, it combines a compact footprint with a sealed IP66 case, an integrated BMS, and left-hand positive polarity. It’s intended for riders and small-vehicle owners who want faster starts, less weight, and an accurate battery percentage display.

How does the YTX9-BS-PRO improve cold or repeated starts?

The PRO model supplies a higher cranking current (300 CCA) and a stable discharge curve to maintain consistent voltage at the starter and ignition systems. That extra burst of current helps engage high-compression engines and multiple starts in quick succession without excessive voltage sag.

• 300 CCA output suited for high-compression motors
• LiFePO4 chemistry delivers strong instantaneous current
• Stable voltage under load supports fuel pumps and ignition coils
• 2,000+ cycle life reduces frequency of replacements

Will this physically fit my bike or ATV and how do I wire it?

Physically the battery is sized at 150×87×105 mm and weighs about 2.1 lbs, designed as a drop-in for YTX9-BS and GTX9-BS form-factor applications. It uses left-hand positive [+ -] polarity; confirm polarity and terminal clearance before installation.

• Exact dimensions: 150×87×105 mm (L×W×H)
• Left-hand positive polarity: [+ -]
• Direct fit for many motorcycles, ATVs, scooters, and some generators
• Ultra-lightweight for reduced unsprung mass

What protections and monitoring does the battery include?

The YTX9-BS-PRO incorporates an on-board BMS and a high-definition Digital SOC percentage display to show remaining energy at a glance. The BMS guards against over-charge, over-discharge, and over-current, while balancing cell voltages for safer, longer service life.

• Digital SOC readout for exact remaining capacity
• Integrated BMS with cell balancing and safety cutoffs
• Protection vs. over-charge, over-discharge, and over-current
• IP66-sealed case resists dust and high-pressure water jets

Are there charging or regulator requirements I should know about?

This battery expects a stable charging system under 15.0 V and performs best with regulated outputs near 14.4 V (±0.2 V). It is not recommended for systems with old shunt-style regulators that can exceed 15 V; if your vehicle has an unregulated or high-output alternator, consider upgrading to a MOSFET regulator.

• Recommended charging voltage: 14.4 V ±0.2 V
• Do not use with shunt-style regulators that exceed 15.0 V
• Compatible with MOSFET/regulator-stabilized charging systems
• Verify charging voltage before installation to protect cells

Who this battery is for: riders and small-vehicle owners who need a lightweight, reliable starter cell—particularly sportbike and performance-machine enthusiasts, ATV/UTV users, scooter riders, and owners of small generators or lawn equipment. It’s tailored to machines that require stout cranking power, benefit from reduced weight, and can supply a regulated charging voltage. Choose the TYKOOL YTX9-BS-PRO when you want a drop-in LiFePO4 upgrade with a clear state-of-charge readout, rugged IP66 sealing, and long cycle life without changing terminal layout.