Trimble R8 (Pentax Ei-D-Li1) Battery with Universal Charger Replacement - Compatible With Trimble R8, 5700, 5800, R6, R7, R8 GNSS, MT1000, 29518, 52030, 54344, Pentax Ei-D-Li1, EI-2000 Replacement Battery and Charger for Trimble R8, 5700, 5800, R6, R7, R8 GNSS, MT1000, 29518, 52030, 54344, Pentax Ei-D-Li1, EI-2000, HP PhotoSmart 912, C912 Universal Charger features adjustable slider to charge different lithium-ion batteries (3.6V/3.7V/7.2V/7.4V) & AA/AAA batteries. Charge your battery by plugging the charger into a USB port. Lifetime Warranty Trimble R8 Battery Specs - Capacity: 2200mAh, Voltage: 7.4V, Upstart Battery Brand On Sale for a Limited Time!