Reviving a battery means one less battery mined, cast, shipped and smelted. Across 30,000+ devices in the field, that quietly adds up — measured in tonnes of lead kept out of the waste stream, and in trees planted.
No offsets, no abstractions. These numbers come from devices working in the field today — and from the pledge attached to every sale.
It's written into how we sell: every tenth device puts a tree in the ground. With 30,000+ units in the field, that pledge has already grown into a small forest — and it grows with every order.
A typical lead-acid battery carries around 12 kg of lead. When it dies early, that lead heads for the smelter — and a freshly manufactured replacement takes its place. Our devices carry each battery through extra replacement cycles instead, so across 30,000 units the arithmetic gets heavy: roughly 70,000 replacements avoided, and 840 tonnes of lead whose disposal has been deferred.
The dirtiest parts of a battery's life — mining, smelting, casting — all happen before it ever reaches you. The cleanest thing you can do is make each battery live longer.

Every ten units plants a tree. Every revived battery keeps lead where it belongs — at work, not in the ground.