User manual

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20. Maintenance of the Capacity of Rechargeable
Batteries
20.1 Rechargeable Battery Emergency Rescue
Test setup: Lithium rechargeable battery, alligator cable, rechargeable battery cell
(deep discharged)
Rechargeable batteries that have been stored unused for a long time or connected
to a permanent current consumer (e.g. an electrical watch) often collapse. This
affects NiCd- as well as NiMh-rechargeable battery cells that then have an opera-
ting voltage that his so low that they are not recognised by automatic rechargeable
battery chargers nor rechargeable.
This can be remedied by short, strong current impulses at a higher voltage, e.g.
from a lithium or 12-V car battery.
Fig. 065: Use with lithium rechargeable battery and alligator cable