Datasheet

Rechargeable Button Cells
2.10 CHARGE TABLE FOR NIMH BUTTON CELLS
Specific currents 0.1 CA 0.2 CA 0.5 CA 0.01 CA to –
0.03 CA
Charge time 14 –16 hours 7– 8 hours 3 hours unlimited –
Recommended 0.1 CA 0.2 CA 0.5 CA 0.01 CA to 0.1 CA for unlimited
charging values 14 –16 hours 7– 8 hours 3 hours 0.03 CA period at +20°C. 0.2 CA
at room temp. preferably time and unlimited for max. 1 year
for the robust family time voltage
3)
at +20°C
V… H (T) controlled controlled
Available capacity (%) 100 100 > 80 100 > 80
TAB. 12
1)
Only at room temperature and after fully discharged cells, voltage control recommended (except V 200 H, V 350 H)
2)
Reduction of life expectancy
3)
For specific cut off voltage ask VARTA Microbattery
Note: NiMH Button Cells shall not be charged at temperatures below 0°C
Normal
charge
Accelerated
charge
Limited fast
charge
1)
Trickle
charge
Max.
possible
Charge Table
FIG. 10 TYPICAL TRICKLE CHARGING
Figure 10 shows battery voltage and
charge current characteristics over
charging time for a 2-cell battery in a
typical trickle charge circuit
Recommended charging current 0.01 CA
at room temperature