About this replacement
Heim & Haus 18796 Rolladenantrieb — 10.8V Li-ion Replacement Battery (HH18796-MOLEX)
This is a 10.8V, 2600mAh Li-ion replacement battery for the Heim & Haus 18796 Rolladenantrieb smart home device. It slots in using the MOLEX connector and restores power to units where the original cell has degraded or failed completely. Voltage and capacity match the OEM specification.
- 18796 and Rolladenantrieb compatibility: Both models run on the same 10.8V rail and share the HH18796-MOLEX connector pinout. The BMS on each accepts the same charge profile, so no firmware or hardware changes are needed when swapping cells between units of this type.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the 18796 platform. The BMS handshake completed correctly, charge acceptance was normal, and the protection circuit tripped at the expected low-voltage threshold without corrupting the device pairing state.
- Post-swap reconnection window: After installing this battery, wait a full 60 seconds before expecting the Rolladenantrieb to respond via your smart home app. These devices run a mesh network re-join sequence after any power interruption, and cutting that window short causes a false "offline" status in the hub.
Why the 18796 drains faster after a battery swap than the old cell did
A new cell at full charge can actually increase polling frequency on some smart home platforms — the controller detects higher available voltage and processes network requests it was previously deferring. If your hub is set to a high polling interval or the device sits on a busy mesh node, current draw goes up noticeably. Check your hub's device settings and lower the polling interval if the drain rate seems excessive. A typical idle draw for this class of device should not exceed a few milliamps at 10.8V.
Low battery alert appearing immediately after fitting a new cell
This happens when the battery has sat in storage long enough for its resting voltage to drop below the alert threshold the hub monitors. The cell is not faulty — it just needs one full charge cycle before the hub reads an accurate state. Plug the device into its charging source and let it reach full voltage before reinstalling or dismissing the alert. Once the cell sits above 12.0V resting, the alert clears and the hub reports normal battery status.