Datasheet

Rechargeable Button Cells
Permanent Charge Current:
Recommended current 0.03 CA for capacity retention
(also known as trickle charge current).
Nominal Discharge Current:
The nominal discharge current of a NiMH cell is the
5 hour discharge current (0.2 CA). It is current at which
the nominal capacity of a cell is discharged in 5 hours.
Ah-Efficiency
The ratio of effective available capacity and capacity
input is denoted as charge efficiency.
η
Ah
is dependent on cell type, charge rate, cell
temperature and discharge rate. In case of nominal
conditions maximum hAh value is approximately 0.8,
that means at least 125% charge input of nominal
capacity is necessary. In practice a charge input of
140 to 160% at the nominal charge current is re -
commended.
C C
I =
t
=
5
= 0.2 CA when t = 5 h
available capacity
η
Ah
=
capacity input
Subject to change without further notice.
No responsibility for the correctness of this information.
For latest technical data please refer to our data
sheets which you will find on our website
www.varta-microbattery.com.
©
by VARTA Microbattery GmbH