Varta 63094, Technical Handbook

Page: 23 / 45

0
20
40
60
80
100
0 2 4 6 8 10 12 14
0.2C Remainin
g
Capacity
[%
]
Months
Storage Characteristic @ Various Temperatures
Remaining Capacity
Start with partly charged cells cc-cv1C/ 3.64V/ I<0.03C @ 20degC, discharge 0.2C/ EOD 3V first cycle @ 20degC
20degC
45degC
Typical aging behavior
COINPOWER | 23
COINPOWER | STORAGE
VARTA CoinPower batteries are delivered in a state-of-
charge (SoC) of approximately 30% of their full capacity.
This provides the best condition for long-term storage
at the lowest self-discharge rate. Higher temperatures
increase the rate of self-discharge. It is recommended
to store the cell at a state-of-charge between 30 % and
50 % at room temperature (20 °C) or lower.
The graph below shows the storage characteristic of a
CoinPower cell after 6 months of storage at 20 °C and at
45 °C. When first going into storage, the cells had an SoC
of approximately 30 %.
Since the self-discharge rate of the CoinPower cell is
very low, cells may be stored for several months without
periodic recharging. This offers convenience and
flexibility for the owners of cells in stock as well as in
the application for the end-user.
Storage Characteristic @ Various Temperatures Remaining Capacity
Storage