MI 3000 EasiPLUS Safety and operational considerations
10
In this situation, Metrel recommend the following procedure to improve the battery
lifetime:
Completely charge the batteries for at least 14h via the instrument built-in
charger.
Completely discharge the batteries (this can be performed by using the
instrument normally until the instrument is fully discharged).
Repeat the charge/discharge cycle at least 2-4 times in order to restore the
batteries to their normal capacity..
When using an external intelligent battery charger, one complete discharging/charging
cycle can be performed automatically. After performing this procedure, a normal battery
capacity should be fully restored and the operating time of the instrument will
approximately meet the data set out in the in the technical specification.
Notes:
The charger in the instrument is a pack cell charger. This means that the cells
are connected in series during the charging so all of them must be in similar state
(similarly charged, same type and age).
If even one deteriorated battery cell (or just one of a different type e.g. capacity,
chemical design) can cause disrupted charging of the entire battery pack which
could lead to overheating of the battery pack and a significant decrease in the
operating time.
If no improvement is achieved after performing several charging/discharging
cycles, the state of each individual battery cells should be determined (by
comparing battery voltages, checking them in a cell charger, etc). It is very likely
that one or more of the battery cells could have deteriorated.
The effects described above should not be mixed with the normal battery
capacity decrease over time. All charging batteries lose some of their capacity
when repeatedly charged/discharged. The actual decrease in capacity compared
to the number of charging cycles depends on the battery type. This information
is normally provided in the technical specification from battery manufacturer.
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