Topcon RL-SV2S, Instruction Manual, Page: 27 / 82

5. Preparation and Functions
19
• How to remove dry cell batteries
1
Remove the DB-74 battery holder by turning battery holder
knob to "OPEN" side.
2
Remove the dry cell batteries from the DB-74 battery holder.
G
*1 Replace all 4 batteries with new ones at the same time. Do not mix used and new batteries,
and do not mix different types of batteries together.
*2 Use alkaline dry cells. (Dry cells for movement confirmation are packed in shipment.)
Nickel hydrogen dry cells and nickel cadmium dry cells can be used too, but the operating
time is different from the time of alkaline dry cells.
*3 Generally, performances of dry cell deteriorate temporarily in low temperature, but recover
in normal temperature.
• It is possible to remove the dry cell batteries from the DB-74 battery holder and use the battery
pack BT-74Q.
• The DB-74 dry cell battery holder cannot be used to charge the BT-74Q Ni-MH battery pack.
Use the DB-74C charging battery holder instead.