Trimble 29518, 38403, 46607, 52030, 54344, 5700, 5800, MT1000, R7, R8 2600mAh Battery

• Lithium Ion, 7.4V, 2200mAh

The batteries were a little thicker than trimble standard batteries but with a little extra effort you could still squeeze the R-8 cover on over them. Quick delievery and they do work properly.