About this replacement
Besam automatische Turoffnung CUD3000 — 18V Ni-MH Replacement Battery (15070)
This is an 18V 1500mAh Ni-MH replacement battery for the Besam automatische Turoffnung CUD3000 automatic door opening system. It powers the electric lock mechanism that controls automated door access in commercial and institutional installations. Also fits the T2 and 15 VRE AAL 700 R variants that share the same voltage rail and connector spec.
- CUD3000, T2, and 15 VRE AAL 700 R compatibility: These models run the same 18V Ni-MH power architecture with an identical OEM connector and BMS handshake profile — one battery cell pack covers all variants without modification.
- Bench tested on actual hardware: We cycled this pack through the CUD3000's lock actuation sequence. The BMS held voltage steady through repeated motor-drive cycles and did not trip the low-voltage cutoff under normal actuation load.
- Post-swap access verification on CUD3000: After fitting this battery, cycle the door system through a full open-and-close sequence before returning the door to service. The CUD3000 controller re-initialises after power interruption and must complete that sequence before all access credentials are accepted.
Why the CUD3000 refuses to actuate immediately after a battery replacement
The CUD3000 controller runs a self-test handshake when power is restored after a swap. Until that sequence completes, the lock motor will not respond to access commands — this is not a fault with the battery. The handshake typically requires one full actuation cycle triggered from the system panel. If the door still does not respond after that cycle, confirm the pack is seated fully and the connector is clicked into place, then trigger actuation again.
Low battery warning active immediately after fitting the new pack
Ni-MH cells shipped in storage state sit at a suppressed resting voltage — typically 1.0–1.1V per cell — which reads as low to the CUD3000's battery monitor. The warning clears once the pack completes one charge cycle through the system's onboard charger. Do not swap the battery out again based on this warning alone. Leave the system connected to mains power and allow a full charge cycle to complete; the alert should clear once cell voltage rises above the controller's 1.2V-per-cell threshold.