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The Mighty Max YTX4L-BS is a sealed lead-acid 12V battery rated at 3 Ah and 50 cold cranking amps, sized for small ATVs, go-karts, quads, buggies and scooters that take the YTX4L-BS format. It is a maintenance-free AGM-style replacement: no acid to add and no water checks. It is a budget option against name-brand AGM batteries, with lower cranking power than larger YTZ or YTX7 units, so it suits small-displacement engines rather than big-bore machines. Owners of small pit bikes and scooters generally find it starts reliably when kept charged, but it needs a tender in storage and is not a fit for every vehicle that lists a similar size.
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Lowest price we've seen: $19.99 on Nov 12 at Lowe's. Tracked across 1 store since Nov 12.
Owners of small scooters, quads and pit bikes report it starts their engines and fits the YTX4L-BS slot as expected. Complaints center on batteries arriving with a low charge or dying after a season of storage, and on it being too weak for bigger machines.
This is a 12V, 3 Ah sealed lead-acid (SLA) replacement battery with a model number of YTX4L-BS. It is listed as a replacement for ATVs, go-karts, quads and buggies, and it is also categorized as a scooter battery.
The battery provides 50 cold cranking amps.
