Peli 3315RZ1 Replacement Battery 3.7V 3400mAh Li-ion

Peli 3315RZ1 / 3315RZ1-RA — 3.7V Li-ion Replacement Battery (03315R-3020-000E)

This 3.7V 3400mAh (12.58Wh) Li-ion cell replaces the OEM battery in the Peli 3315RZ1 and 3315RZ1-RA rechargeable flashlights. It fits the single-cell cylindrical bay used in both variants and matches the original voltage and capacity. The 3315RZ1 is a tactical torch used across law enforcement, military, and emergency response — this cell keeps it operational.

• 3315RZ1 and 3315RZ1-RA compatibility: Both models share the same battery bay, driver board, and charging circuit. The -RA variant carries the same voltage rail and connector orientation, so one cell covers both.
• Bench tested on actual hardware: We cycled this cell through the 3315RZ1 driver under full-load conditions. The BMS held voltage within tolerance across turbo and standard output modes, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
• Single-cell replacement protocol: The 3315RZ1 runs one cell. If you carry a spare and rotate between two, label them and cycle both regularly — a cell left discharged for weeks can drop below 2.5V, triggering an irreversible BMS lockout that prevents recharging.

High-powered flashlight dimming before the battery indicator shows low

The 3315RZ1 driver uses brownout protection to step down output before the cell actually reads empty. When the cell voltage sags under high current draw in turbo mode, the driver reduces output to protect the cell — even if the indicator still shows charge remaining. This is intentional behaviour, not a fault. If the light dims early and steps down on its own, the cell is approaching its lower voltage threshold under load. Switch to a lower output mode to maintain usable light output through the remainder of the charge cycle.

Significantly shorter runtime in turbo mode versus standard mode

Turbo mode on the 3315RZ1 draws substantially more current than standard or low modes — often five to ten times higher. A 3400mAh cell delivers the same total energy regardless of mode, but at turbo current draw, that energy depletes far faster. Heat also builds in the cell under sustained high-current output, which further accelerates voltage sag. For extended use, standard mode is the practical setting — switch to turbo only when peak output is needed, then drop back down.