Fill the two unused connectors (from the temp sensor) with hard glue. This prevents users from accidentally using a Rollei Charger N or G, which are not suitable for the battery type and might cause fire or explosion.

Charge the battery with a Lithium capable LiFePO4 charger only!

Notice that the battery has now only 81g compared to 210g for the old NiCd.

Happy using your Rollei again!