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CRYSTAL® BATTERY USER MANUAL
3.1.6 GRLS 2-Volt Float Charge Specifications
The above graph represents the correct charge profile for the 2-volt GRLS batteries and indicates the minimum
required charge curve for float or standby applications with a maximum DOD of 80% (to 1.80 volts per cell at a
C10 load, higher loads would imply a lower end voltage) at an environmental temperature not exceeding 25°C.
Bulk/Boost phase charge with a constant current of 0.10C @C10 (10% of the battery’s 10 hour rated capacity) for
6 hours with a variable voltage until the battery voltage reaches 2.283 volts. Do not exceed 7 hours charge time
in the bulk/boost phase.
Absorption/Float phase charge with a constant voltage of 2.28 volts and a variable current of 0.1C to 0.01C @
C10 (10% down to 1% of the batteries 10 hour rated capacity).
A periodical purification charge must be applied to the batteries when used in a FLOAT application. See Section 3
for details on purification charging.
See the previous table and the datasheet for float settings for the 2-volt blocks.
