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Glossary:
E
ECP = Electronic Cell Protection
Specific protection of cells which prevents overheating, overload and deep discharge and guarantees a long lifetime. This special protection can currently only be found in Bosch Li-Ion products. Energy content (Wh)
Indicates the work load per battery charge. The higher the energy content, the longer the possible runtime. Expressed in watt-hours (Wh) as: capacity (Ah) x voltage (V).
e.g.
24 (V) x 2.6 (Ah) = 62.4 (Wh)
36 (V) x 2.6 (Ah) = 93.6 (Wh) C
Capacity
Capacity (Ah) can be used as an indicator for the comparison of work load per battery charge with the same voltage. The higher the capacity, the longer the achievable runtime. Energy content (Wh) can be used as an indicator for the comparison of work load per battery at different voltages. L
Lazy battery effect
This effect occurs with the NiMH batteries and is the same as memory effect.
Charge time
Charge time is defined as time from when the charging actually starts until the battery is fully charged. Putting the battery in the charger does not mean the battery starts charging. For example, if it is too hot, the battery needs to be cooled down prior to charging, which can give the impression that the charge time is longer than expected. Power (Watt)
The electrical power provided by a battery is determined by the current (A) flow multiplied by the battery voltage (V). For a given power, a battery with higher voltage is more efficient due to the lower current drawn (because the lower the drawn current, the less energy is lost through heat development). M
Memory effect
Memory effect is a physical effect, which causes a lower available capacity. It is a result of batteries not being fully discharged before charging them again. Memory effect can affect NiCd and NiMH batteries. Li-Ion technology avoids this memory effect and allows charging without preventive full discharge. S
Self-discharge
Self-discharge is a tendency of electrochemical cells to lose energy due to internal chemical reactions. It is usually expressed as a percentage loss per day or month. D
Deep discharge
When a battery is almost empty, voltage starts to drop rapidly. Continuing to discharge beyond the cut-off voltage (which is called the deep discharge phenomenon) can damage battery cells and shorten the battery’s lifetime extremely. O
Overheating
Exposing batteries to extreme temperatures (because of outside conditions or overload) dramatically reduces the battery’s lifetime (see Electronic Cell Protection). Overload
Discharging the battery with very high currents may result in strong heat generation (overheating) or irreversible changes inside the battery cells. C
Cycle
1 cycle is made of 1 charging sequence and 1 discharging sequence. Cycle life indicates how many charge/discharge cycles can be achieved.
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