Topcon RL-VH4DR/G2 - Replacing Battery

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Replacing Battery
1 Keep pushing the battery cover in 1 direction, and then try to slide the cover in 2 direction.
The cover does not move but it will be open.
2 Take out the battery and place a new one into the battery box.
3 Press the lid down and click to close.
[1]
[2]