AEG 413184 3.6V Cordless Drill Replacement Battery 2500mAh

AEG 413184 / SE3.6 / SL3.6 — 3.6V Li-ion Replacement Battery (4935413165)

This is a 3.6V Li-ion battery rated at 2500mAh (9Wh), built to the OEM specification of part number 4935413165. It fits AEG compact cordless tools in the 413184, SE3.6, and SL3.6 series. All three share the same 3.6V rail, connector footprint, and BMS communication protocol.

• SE3.6 and SL3.6 platform compatibility: These models run the same 3.6V single-cell architecture with an identical terminal layout and BMS handshake sequence. Swapping between them requires no adapters or firmware changes — the pack identifies itself to the tool's controller the same way the factory unit does.
• Bench tested on actual hardware: We cycled this pack through repeated trigger-pull events on a 413184-series driver. The BMS held inrush current within spec on cold starts and correctly flagged an over-discharge event at 2.5V cell floor without locking out the charger.
• Motor inrush conditioning on first use: Run the tool at partial load — light fastening, not max-torque driving — for the first two cycles. This lets the BMS log the motor's inrush current signature and set its overcurrent threshold accurately before you put the pack under full stress.

BMS overcurrent trip on trigger-pull inrush at the 3.6V single-cell level

At 3.6V with a single Li-ion cell, there is very little headroom between normal inrush current and the BMS overcurrent threshold. A hard trigger-pull on a seized or heavily loaded fastener can spike current above that threshold in milliseconds. When that happens, the BMS latches off to protect the cell, and the tool stops dead mid-operation. The fix is to release the trigger fully, wait three seconds for the BMS to reset, then re-engage at reduced torque.

Charger not recognising the pack after storage

If the pack has sat unused for several months, cell voltage may have dropped below the charger's acceptance threshold — typically around 2.5V for a 3.6V Li-ion cell. The AEG charger reads the cell as faulty and refuses to begin a charge cycle. Place the pack in the charger and leave it connected for up to 15 minutes — most AEG chargers include a trickle wake-up mode that will nudge the cell back above the acceptance floor before switching to full charge. If the charger still shows a fault after 15 minutes, check cell voltage directly; anything below 2.0V indicates permanent cell damage.