The problem it guards against
Plenty of small rechargeable devices — lights, sensors, gadgets of every kind — have lithium cells with no low-voltage protection. Leave one in a drawer and the cell slowly drains itself.
Once a lithium cell falls below its recovery threshold, no charger will take it back. The device isn’t broken — its battery starved to death. The fix is cheap insurance: an adapter that tops the cell up from alkaline batteries on a schedule. Alkalines sit for a decade without meaningfully self-discharging, which makes them the perfect long-term babysitter for fragile lithium cells.
Plug the device into the keeper, walk away, and come back months later to a battery that’s still alive.
How the trunk works it
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Collect
The failure mode: rechargeable USB-C devices with no low-voltage protection, ruined by neglect.
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Work it
Alkalines sit for a decade without self-discharging — the perfect babysitter for fragile lithium cells.
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Deliver
A small keeper adapter: plug the device in, walk away, come back to a battery that’s still alive.
Status: concept stage.
More information
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