Topcon Battery BT-66Q for GPS Topcon RC-3/GMS-2 FC-2000

Mode;: BT-66Q

Specifications:

Features:

• Long battery life.
• Reliable supply of power in the field.
• Batteries and chargers compatibly matched.
• Quick charging of batteries.
• Prevention of the memory effect in batteries.
• Trickle charging after completion of charging.
• Microprocessor controlled and monitored charging.

Charging the batteries

New and stored batteries

New NiCd and NiMH batteries reach their maximum capacity only after a few charging and discharging cycles. The batteries should be fully discharged and charged three to five times. NiMH batteries that have been stored and not used for an extended period (more than a month) should be refreshed simularly. For Li-Ion batteries, a single discharging and charging cycle is sufficient.

Batteries in regular use

After use the battery can be placed in the charger until fully charged (the green light flashes). The charging time depends on the battery capacity and temperature.

Charging temperature

The charging temperature (ambient temperature) has a significant impact on the life of the batteries. Charging at high temperature can cause loss of capacity. These losses in capacity are irreversible. Even with several charging and discharging cycles, the original capacity can no longer be obtained. For optimal charging, we recommend that the batteries be charged at ambient temperatures as low as possible (+10 °C to +20 °C / +50 °F to +68 °F). The permitted temperature range in which charging can still be performed is between 0 °C and +35 °C (+32 °F and +95 °F). Due to a temperature control mode built into the GKL221, GKL211 and GKL112, charging at temperatures that may cause damage to the batteries is not possible.

Useful capacity

The temperature has a particularly significant effect on the useful capacity of a battery. In accordance with the operating range for the surveying instruments, the batteries can be operated from –20 °C to +55 °C (–4 °F to +131 °F). With reducing temperature the useful capacity drops rapidly. Continuous use in the upper temperature range (> +45 °C / +131 °F) shortens the life of the battery.