SCANGRIP Midiform 03.5316 Replacement Battery 3.7V 1600mAh

SCANGRIP Midiform — 3.7V Li-Polymer Replacement Battery (03.5316)

This 3.7V, 1600mAh lithium-polymer battery replaces the OEM cell in the SCANGRIP Midiform work light. It fits the Midiform (03.5421), UV Form (03.5408), and compatible variants sharing part number 03.5316. Dimensions are 57.50 × 28.90 × 8.80mm — confirm these against your original cell before ordering.

• Midiform and UV Form compatibility: Both the Midiform and UV Form share the same battery bay dimensions and draw from the same 3.7V cell with identical connector pinout. The BMS protection circuit handles over-discharge and over-current cutoff the same way across both models.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Midiform platform. The BMS protection tripped correctly at low-voltage cutoff, and the cell held capacity within expected tolerance across repeated cycles.
• Single-cell swap rule: The Midiform runs on one cell. If your flashlight has been in service for a long time, check the battery contacts for corrosion before fitting the new cell — corroded contacts increase resistance and cause the driver to step down output earlier than the cell voltage warrants.

SCANGRIP Midiform dimming before the battery indicator hits low

The Midiform's driver circuit monitors cell voltage directly. When voltage sags under load — even briefly — the driver steps down output to protect the cell from a deep-discharge event. This happens before the indicator LED signals low battery because the indicator threshold is set conservatively. A degraded or partially charged cell sags further under high-output draw, triggering the stepdown earlier. If you see this on a fresh cell, check contact resistance first — clean the contacts and measure voltage under load with a multimeter; it should hold above 3.5V.

Flashlight cycling through modes on its own near end of charge

Mode-cycling near end of charge is a brownout loop in the driver. The cell voltage drops below the driver's minimum operating threshold, the driver resets, the cell partially recovers, and the cycle repeats. This is not a fault in the replacement cell — it means the cell is genuinely depleted and the driver is protecting it. Switch to the lowest output mode to get remaining usable light, then charge immediately. After a full charge, cell voltage at rest should read between 4.1V and 4.2V.