HANDBOOK Rechargeable Lithium VARTA PoLiFlex

VARTA PoLiFlex ®
6. STORAGE
VARTA PoLiFlex ® batteries are delivered in a state of
charge which gives the best of long-term storage performance
being approx. 60 % of their full capacity.
This enables the best conditions for long term storage.
Most serious storage condition for all rechargeable
Li-Ion/Polymer/VARTA PoLiFlex ® cells and batteries
is the fully charged state (CC/CV 4.2 V, 3h). This state
leads to a selfdischarge (retention capacity) and to
a certain irreversible capacity loss depending on the
temperature during storage (recovering capacity).
Trickle charge, like in aqueous battery systems (Ni-Cd,
Ni-MH), is not necessary due to the very low self discharge.
Continuous charging will cause to performance
loss.
FIG. 74
Retention and recovery capacity after various
– even abusive – storage conditions
FIG. 75
Cell height after various – even abusive –
storage conditions
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