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Quite a few differences. Nickel-metal-hydride (ni-mh) batteries:

Charge Faster;

Hold a charge longer;

Have far less 'memory effect';

Last longer;

But are generally more expensive.

Ni-mh batteries are by far the better choice.

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Q: Is there a difference between ni-cd batteries and ni-mh batteries?
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Will a NiMh charger charge NiCad Batteries?

Some will, but it is not recommended because it can damage the batteries or the charger. Invest in a NiCd charger or better yet get some NiMh batteries. NiMh batteries are better than NiCd in every way.


Can you use NiCD battery in place of NiMH battery?

Yes, as long as you use an NiCd charger, but you really shouldn't. NiMh has twice the capacity of NiCd and it is less expensive. NiMh also contains no toxic materials so it is better for the environment.


How many volts does a flashlight need to make it work?

The answer is governed by the size of the flashlight. Count the amount of batteries that go into the flashlight and then multiply by 1.5 and this will give you the voltage of the flashlight. For NiCd and NiMH rechargeable batteries multiply by 1.3 volts.


Do quickcharge household battery chargers damage or shorten the life of rechargeable batteries as opposed to slow or regular chargers?

Not significantly. So long as it is done using a properly designed smart charger, most NiMH batteries can be recharged in about an hour without any damage or significant reduction in their life. However, NiMH batteries must only be rapid charged with a charger specifically designed for charging NiMH batteries. Chargers designed to rapidly charge NiCd batteries can overcharge NiMH batteries. While it may be true that rapid charging NiMH batteries can reduce battery life by a small amount (probably less than 10%), this should be more than offset by the inconvenience of always slow charging batteries.


Why do you prefer NiMH batteries?

There are several advantages of NiMH batteries compared to ordinary alkaline batteries: 1. They can be recharged hundreds of time. So a single NiMH battery can literally replace hundreds of alkaline batteries over its lifetime. This saves money, results in fewer batteries being discarded, and uses fewer resources. 2. The voltage of NiMH batteries is relatively constant with use. The voltage of alkaline batteries decreases as the battery is used. For example a flashlight dims with use when using alkalines. But with NiMH batteries, it will stay bright until the batteries are exhausted. 3. Due to the low internal resistance of NiMH batteries, the voltage does not drop nearly as much under a load as alkaline batteries. 4. Also because of the low internal resistance, the capacity of a NiMH battery does not drop very much under heavy loads. This is why you can typically get many more shots with a digital camera if you use NiMH batteries rather than alkaline batteries. 5. NiMH batteries can deliver a much heavier current. Some devices, such as high power flashlights, cannot run (or cannot run for long) on alkaline batteries (at least on the highest settings). NiMH batteries are required to make the most of these devices. 6. Alkaline batteries may leak when they get old and/or are discharged too quickly. This can destroy whatever device they are used in.

Related questions

Your camera insists to use nimh AA batteries can you use nicd batteries?

yes. NiMH batteries and chargers are easier to come by though. Alot of times, the mAh will be higher in the NiMH batteries as well...so there is really no point to using NiCD unless you'd prefer it.


Will a NiMh charger charge NiCad Batteries?

Some will, but it is not recommended because it can damage the batteries or the charger. Invest in a NiCd charger or better yet get some NiMh batteries. NiMh batteries are better than NiCd in every way.


Are mcVolt Li-Ion laptop batteries really better than NiMh and NiCd batteries?

Nickel Cadmium batteries contain Cadmium, a toxic heavy metal, which is harmful to the environment. Nickel-Metal Hydride batteries offer a higher capacity(runtime)per same size(voltage output) than NiCd batteries and mcVolt Litium Ion laptop batteries have a higher capacity than NiMh(those sold by most manufacturers). NiMh batteries are also lighter and have little memory effect compared to their NiCd counterparts. mcVolt Li-ion laptop batteries are light, have a higher capacity and have no memory effect compared to NiMh and NiCd batteries.


Is it true that if you put a battery in the fridge it will recharge?

No, but refrigerating NiMh/NiCd batteries will increase their shelf life. Never freeze batteries.


Will a NiCd charger charge NiMh Batteries?

A NiCad charger has different sensor values than NiMh. I would find a charger that has a switch to select either, or specifically a Nickel Metal Hydride battery charger to prevent damaging and shortening the life of your batteries.


Can you use NiCD battery in place of NiMH battery?

Yes, as long as you use an NiCd charger, but you really shouldn't. NiMh has twice the capacity of NiCd and it is less expensive. NiMh also contains no toxic materials so it is better for the environment.


What battery technology is directly replacing nicd?

NiMh is usually considered the most direct replacement of NiCd.


Can you use a rechargeable NiMH battery in a wireless mouse?

yesYou can use a NiMH battery in just about any application you would use a normal alkaline battery. However, NiMH batteries do not perform well in low energy applications - they are designed for use in high energy devices like digital cameras. For things like clocks, standard alkaline batteries are better suited.In my personal experience, the NiMH and NiCd batteries did not perform as well in my wireless LASER mouse. Alkaline batteries performed a whole lot better. The problem is that NiMH and NiCd have relatively high "self discharge" rates; that is, while they are not in use, they will loose their charge over a fairly short time as opposed to alkaline batteries which loose their charge at a much smaller rate and over a much, much longer period. Also of consideration is the fact that rechargeables (NiMH & NiCd) produce 1.2v at full charge (NiMH can achieve 1.4v, but for very short time) whereas alkaline batteries are 1.5v. This 0.3v can be a problem with some electronic devices. 9V rechargeables only deliver 7.2v.


What kind of batteries are NIMH batteries?

NIHM stands for nickel metal hydride battery. The NIHM batteries are similar to other types of rechargeable batteries like the more common nickel-cadmium NiCd types but with much more charge capacity.


How do you know if a rechargeable battery is NiCD or NiMH there are only mAH markings on the batterys and both are 7.2V packs made up of six 1.2V units one is 1600mAH and the other is 3000mAH?

Looks like both are NiMH as NiCd batteries are generally not available for more than 800mAH rating. NiMH are common to have 1600mAH and more rating per AA cell. - Neeraj Sharma


Which batteries do you use in medical equipments?

NiCd, Lithium, Lood, NiMH, Li-ion, Alkaline. I can't tell you which types are appropriate for your medical device(s), anyway! (NiCd and Lithium battery types must be disposed off properly).


Is it OK to mix NIMH and NiCd batteries in an electronic device?

You should NEVER mix different types of batteries in any device. The charging characteristics are different and one type will charge "harder" than the other.