SCANGRIP Mini Slim 3.7V 1000mAh Replacement Battery

SCANGRIP Mini Slim — 3.7V Li-Polymer Replacement Battery (03.5387)

This 3.7V, 1000mAh Li-Polymer battery replaces the original cell in the SCANGRIP Mini Slim compact work light (03.5610). It matches the OEM voltage, capacity, and slim-pack dimensions (53.00 × 20.30 × 10.00mm) so it seats correctly in the housing without modification. When the original cell loses capacity and the light no longer holds charge, this is the direct swap.

• Mini Slim platform fit: The Mini Slim uses a single flat Li-Polymer cell matched to its integrated driver circuit. Voltage must sit at 3.7V nominal — cells outside that spec cause the driver to misread charge state and step down output prematurely.
• Bench tested on actual hardware: We ran charge and discharge cycles on this cell and confirmed the BMS accepts a full charge without false cutoffs. Capacity measured at or above the rated 1000mAh on first full cycle.
• Single-cell storage tip: Li-Polymer cells in compact lights degrade faster when stored fully charged for weeks at a time. If the Mini Slim is going on the shelf, discharge it to around 50% first — this reduces electrolyte stress on the single cell and slows capacity fade between uses.

Mini Slim dimming before the indicator shows low

The Mini Slim's driver circuit monitors cell voltage in real time. As the Li-Polymer cell ages, its internal resistance rises — even when the indicator still reads partial charge, voltage under load sags below the driver's threshold. The driver steps down output to protect the cell, so the light dims before the indicator catches up. A fresh cell with lower internal resistance holds voltage under load and keeps output stable longer.

Replacement cell not charging after fitting

A Li-Polymer cell that sits discharged in storage for too long can drop below the driver's minimum acceptance voltage — typically under 2.5V. When voltage is that low, the charger circuit in the Mini Slim refuses to begin a charge cycle as a protection measure. To recover it, use a standalone Li-Po charger with a trickle or recovery mode to bring the cell back above 3.0V, then reconnect it to the Mini Slim for a normal charge cycle.