AEG FM 36 Replacement Battery 3.6V 2000mAh Ni-MH Type141

AEG FM 36 / Junior 2.0 — 3.6V Ni-MH Replacement Battery (Type141)

This is a 3.6V, 2000mAh Ni-MH replacement battery for the AEG FM 36 and Junior 2.0 cordless handheld vacuums. It replaces OEM part number Type141. Fits the existing battery compartment with no modifications needed.

• FM 36 and Junior 2.0 compatibility: Both models share the same 3.6V cell configuration, connector pinout, and physical housing spec. One replacement cell fits either unit — no adapter, no rewiring.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the FM 36 platform. The BMS accepted the cell without fault codes, and motor start current settled within normal range on each test run.
• Dock charging on the FM 36: Do not leave the vacuum sitting on the charging dock permanently. The FM 36 dock does not terminate the charge cycle once full — continuous trickle current degrades Ni-MH cells faster than normal use cycles. Charge to full, then remove from dock.

Battery fade from leaving the FM 36 on the dock continuously

The AEG FM 36 charging dock applies a trickle current after the cell reaches capacity. Ni-MH chemistry handles this poorly — sustained low-level charging raises cell temperature and accelerates electrolyte breakdown. Over weeks, this compresses usable capacity well below the rated 2000mAh. Charge only when the vacuum is depleted and remove it from the dock once the charge cycle completes.

Suction dropping noticeably before the low-battery indicator activates

This happens when the cell voltage sags under motor load before the indicator threshold triggers. A partially clogged filter forces the motor to draw higher current, which accelerates voltage sag and makes the drop feel premature. Check and clear the filter first — if suction still drops early on a new cell, the issue is load-related, not capacity. A healthy Type141 cell should hold 3.6V output through normal debris loads without early sag.