Adalit L-3000 Replacement Battery 3.7V 5200mAh Li-ion

ADA-RO Adalit L-3000 / IL-300 — 3.7V Li-ion Replacement Battery (90703201)

This is a 3.7V, 5200mAh (19.24Wh) lithium-ion battery for the Adalit L-3000, Adalit L-3000 Power, and IL-300 torches. These lights are used in emergency response, industrial inspection, and security work — situations where a dead torch is not an option. This battery matches the OEM voltage, capacity, and cell dimensions (70 × 37 × 20mm) of the original.

• L-3000, L-3000 Power, and IL-300 compatibility: All three models share the same battery bay geometry, 3.7V supply rail, and BMS handshake — one cell format covers the whole platform without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the L-3000 driver. The BMS accepted charge correctly, cell voltage held stable under high-output draw, and protection cutoff triggered cleanly at the low-voltage threshold.
• Single-cell replacement — swap the whole unit: The L-3000 runs on one cell, so partial replacement is not a concern here. What matters is waiting until the existing cell is fully depleted before storage — lithium cells sitting at partial charge degrade faster than those stored near 50% state of charge.

Turbo mode runtime dropping faster than expected

Turbo on the L-3000 drives the LED at maximum current — typically five to ten times the draw of a standard or low mode. A 5200mAh cell delivers its full capacity regardless, but high-current discharge compresses usable capacity because internal resistance converts more energy to heat than light. If turbo runtime feels short, that is physics, not a fault in the cell. Drop to high or standard mode to recover proportionally more of the cell's rated capacity per use cycle.

Flashlight stepping down output before the indicator reads low

The L-3000 driver includes brownout protection — when cell voltage drops under sustained high-current draw, the driver steps the output down rather than cutting off. This can look like early dimming even though the battery indicator has not triggered. It is the driver protecting the cell from voltage collapse, not a sign of a weak battery. If you see this, switch to a lower mode and allow the cell voltage to recover — it will typically stabilise above the brownout threshold within seconds.