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Discharge efficiency Self-discharge rate Shelf life ... Rechargeable alkaline: 5–100 [14] ... Low self-discharge nickel–metal hydride battery:
An alkaline battery (IEC code: L) is a type of primary battery where the electrolyte (most commonly potassium hydroxide) has a pH value above 7. Typically these batteries derive energy from the reaction between zinc metal and manganese dioxide .
This makes NiMH batteries better suited for high current applications than alkaline batteries. [10] Self-discharge rates are comparable between NiMH and alkaline batteries during the first six months. [10] Rechargeable alkaline batteries produce a voltage of about 1.5V, compared with NiCd and NiMH batteries which produce about 1.2V.
26,000 (alkaline) 6: Screw posts on top of battery. +: corner, −: center. ... Each cell needs around 1 cm 3 of air per minute at a 10 mA discharge rate. These cells ...
Self-discharge is a phenomenon in batteries. Self-discharge decreases the shelf life of batteries and causes them to have less than a full charge when actually put to use. [1] How fast self-discharge in a battery occurs is dependent on the type of battery, state of charge, charging current, ambient temperature and other factors. [2]
The cut-off voltage is different from one battery to the other and it is highly dependent on the type of battery and the kind of service in which the battery is used. When testing the capacity of a NiMH or NiCd battery a cut-off voltage of 1.0 V per cell is normally used, whereas 0.9 V is normally used as the cut-off voltage of an alkaline cell ...
Manufacturers specify the capacity of a battery at a specified discharge rate. For example, a battery might be rated at 100 A·h when discharged at a rate that will fully discharge the battery in 20 hours (at 5 amperes for this example). If discharged at a faster rate the delivered capacity is less.
The C rate is that which would theoretically fully charge or discharge the battery in one hour. For example, trickle charging might be performed at C/20 (or a "20-hour" rate), while typical charging and discharging may occur at C/2 (two hours for full capacity). The available capacity of electrochemical cells varies depending on the discharge rate.