How do NiMH battery chargers work?

How do NiMH battery chargers work?

After a certain time, or when the cell voltage reaches a certain point, a cool down period is placed into the charge cycle. The charge cycle then proceeds at a lower current. The NiMH charger then applies further current reductions as the charge progresses. This scheme continues until the battery is fully charged.

Do batteries have short circuit protection?

Protected Lithium-Ion (Li-ion) batteries have a small electronic circuit integrated into the cell packaging. This circuit protects the battery against common dangers, such as overcharge, over discharge, short circuit/over current, and temperature.

Why do rechargeable batteries not work in some devices?

The device may have a low voltage cut out of 4.9 volts. So when each battery is discharged to 1.225 volts the device will cease to operate. A similar rechargeable cell has a voltage of 1.2 volts so the same combination of cells will only yield 4.8 volts which is already lower than the low voltage cut out.

Can you charge NiMH batteries with a NiCad charger?

The controler inside charges the battery differently. That’s why NiMh chargers can do NiCad. For 2 cents extra they give you the option to charge NiCad in NiMh Chargers. NiMh batteries get extrememely hot with charging.

Can I use a battery charger as a power supply?

There are situations where a battery charger may need to function as a power supply, as well as maintain batteries. A 30 amp charger can supply up to 30 amps continuously if the load demands it. …

How do I keep my battery from short circuiting?

Methods to protect against short circuit include, but are not limited to, the following: Pack each battery or each battery-powered device when practicable, in fully enclosed inner packagings made of non-conductive material (e.g., a plastic bag).

Why is it bad to short circuit a battery?

If by short circuit you mean sticking a metal rod across the two terminals, then it WILL explode. That’s it, nothing else, it will just explode. Those batteries are filled with acid, so if whatever shrapnel that doesn’t harm you, the acid will.

Can I overcharge NiMH batteries?

Newer NiMH batteries are designed with vents in the cells and will emit small amounts of hydrogen to prevent this from happening. Overcharged NiMH batteries can heat up very quickly, rising to temperatures that could damage either the battery or the electronics in the charging unit.

Are NiMH batteries compatible?

They can be charged up to 500-1000 times and last longer than alkaline or NiCd batteries. NiMH batteries are ideally compatible with most consumer devices such as digital cameras, game boys, CD players, RC vehicles, PDA’s, portable two-way radios, flash units and many more high drain devices.

Do rechargeable batteries work in all devices?

You can use rechargeable batteries in absolutely any device where you would normally use an alkaline battery, unless stated otherwise by the device manufacturer. There are no interference implications using rechargeable battery brands that are different to the device brand.

Can you use a NiMH battery instead of a NiCd battery?

Many people have asked “can I use NiMH (Nickel Metal Hydride) batteries in my solar lights that have NiCd (Nickel Cadmium)?” And the answer is, yes! Not only can you replace with NiMH, but they are the better choice of battery as they have benefits that their NiCd counterparts don’t.

Can I charge a NiMH battery with a wall mount Charger?

To preserve the life of the battery, do not allow a wall mount charger or laptop adapter to charge a NiMH battery for more than 13 to 15 hours.

Do NiMH batteries lose capacity over time?

NiMH batteries stay at about 1.2 volts for almost 80\% of their discharge cycle. Once alkaline batteries discharge to 50\% capacity, it will be delivering a lower voltage than a NiMH battery. Q: What you NEVER want to do with replaceable batteries? Q: Do NiMH batteries lose capacity over time? A: Yes, but nothing drastic.

What is the difference between alkaline batteries and NiMH batteries?

The main difference is that an alkaline battery starts at 1.5 volts and gradually drops to less than 1.0 volts. NiMH batteries stay at about 1.2 volts for almost 80\% of their discharge cycle.

How to replace batteries in a portable radio?

If you are tired of replacing batteries in your portable radio or in any other battery-powered device, using an AC power adapter is a good alternative. All you need to do is to determine the voltage (V) and current (mAh) of the device. Then, attach the appropriate adapter to the place where the batteries make contact inside the device.