Will this battery work with my existing 12V tool charger?

Compatibility depends on your charger's connector type and voltage rating. Check that your charger supports 12V lithium-ion cells and has the matching terminal or connector—this battery is 12V nominal, so standard 12V chargers should work, but verify the physical fit first.

How long does this battery hold a charge when not in use?

Lithium-ion cells naturally hold charge better than NiCd or NiMH batteries over months of storage. Charge it before you need it, and it'll be ready. For long-term storage beyond a few months, store in a cool, dry place.

Can I return this if it doesn't fit my tool?

Returns follow standard ModSupply policy. Before purchase, confirm your tool or charger accepts a 12V lithium-ion battery with matching connectors—that'll save a return trip.