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Should you discharge NiMH batteries?
NimH life can be enhanced substantially by never discharging them fully on any occasion. Even when using multiple sets during a day’s shooting, if you can manage to leave the last 10% or so of capacity in the battery you will get substantially longer life from them.
Can you over discharge NiMH?
Excessive overcharging of a NiMH cell can result in permanent loss in capacity and cycle life. If a cell is overcharged to the point at which pressure begins to build up, elevated temperatures are experienced and can cause the separator to lose electrolyte.
What voltage should I discharge NiMH batteries to?
4 Answers. NiMH cells start at about 1.5 V right when fully charged, drop to about 1.2 V most of their discharge life, and are pretty much empty at 900 mV. Stopping there is usually safe. 800 mV is where you definitely want to stop to avoid damage.
How do I test a NiMH battery with a multimeter?
1)Place your rechargeable battery in its approved battery charger and allow the device to charge for the period prescribed. 2)Switch your multimeter on and change the measurement dial to measure direct voltage, ensuring that the dial is adjusted to measure at least the full number of volts that the battery can provide.
How fast do NiMH batteries discharge?
NiMH batteries – like any rechargeable battery – will self-discharge if left unused. Generally, within 30 to 60 days, batteries will become almost completely drained.
How fast can you discharge a NiMH battery?
Nickel–metal hydride battery
| Modern NiMH rechargeable cells | |
|---|---|
| Specific energy | 60–120 W·h/kg |
| Charge/discharge efficiency | 66%–92% |
| Self-discharge rate | 13.9–70.6% at room temperature 36.4–97.8% at 45 °C Low self-discharge: 0.08–2.9% (per month) |
| Cycle durability | 180–2000 cycles |
How do you know if a NiMH battery is good?
Usually, a fully charged battery would display a voltmeter reading of around 1.5 volts. That means your battery is in good shape if your voltmeter shows a voltage anywhere between 1.3-1.5 volts. 4)A strong indication that your battery has excessive voltage is any voltage above 1.5volts.
What’s the best way to charge a NiMH battery?
FAST-CHARGE, TOPOFF and DONE modes are included for highly reliable, safe charging of NiMH cells. Discharge mode allows the DS2715 to enter a low power sleep state while the cell pack is being discharged. Search our knowledge base for answers to your technical questions.
Which is better an AA or NiMH battery?
Early AA NiCd rechargeable batteries provided approximately 25% of the capacity of alkaline non-rechargeable batteries. However, the latest AA NiMH batteries provide approximately 75% of the capacity of alkaline AA batteries at low drain rates and can surpass alkaline performance in high drain applications (i.e. digital cameras).
How does ds2715 NiMH battery pack charge controller work?
The DS2715 pre-conditions severely depleted cells before entering full charge mode. It terminates full charge using the dT/dt technique, which requires an external sensing thermistor. Over-temperature, under-temperature, and over-voltage detection prevents charging under unsafe conditions.