Both batteries have been individually tested in a working Sonim XP3.20 handset. Genuine Sonim OEM Battery. Manufacturer: Sonim. Genuine OEM Sonim Product. 2 × Genuine Sonim XP3.20 OEM Batteries. Genuine OEM Sonim batteries are now becoming increasingly scarce, making these an excellent choice for anyone maintaining one of these legendary rugged handsets.
