This type of charger can fully charge NiMH batteries, but it might take a very long time to do so. It’s possible that an old NiCd charger could take as long as 48 hours to fully charge new high capacity NiMH batteries!
Nickel- and lithium-based batteries require different charge algorithms. A NiMH charger can also charge NiCd; a NiCd charger would overcharge NiMH. Do not leave a nickel-based battery in the charger for more than a few days. If possible, remove the packs and apply a brief charge before use.
Likewise, what current should I charge my NiMH battery? While NiCd batteries may be trickle charged at a rate of around 0.1C, this is considered too high for NiMH batteries and it is generally accepted that for most NiMH batteries trickle charging should be accomplished at a rate of about 0.05C.
Simply so, are NiCd and NiMH batteries interchangeable?
To some degree, Nickel Metal Hydride (NiMH) is interchangeable with Nickel Cadmium (NiCd) — with caveats. The issues related to replacing NiCd with NiMH are the charge methods, the discharge characteristics (specifically rate capability) and then the effect of both on cycle life.
What battery is better NiCd or NiMH?
For most electronic devices it is better to use NiMH batteries than NiCd batteries. NiCd batteries use Cadmium, a highly toxic heavy metal, that can damage the environment if not disposed of properly. NiMH batteries usually have a higher capacity than NiCd batteries of the same size.
When should I charge my NiMH batteries?
A: Yes, before you use them for the first time, you need to charge your NiMH batteries fully. Please note that for new NiMH batteries, it is often necessary to cycle them at least three to five times or more before they reach peak performance and capacity.
How long do NiMH batteries last?
approximately two to three years
What happens if you overcharge a NiMH battery?
Overcharged NiMH batteries can heat up very quickly, rising to temperatures that could damage either the battery or the electronics in the charging unit. To counteract this danger, some quick chargers are designed with a fan to keep the batteries cool.
Can you overcharge rechargeable batteries?
Don’t overdo it. Disconnect chargers and devices with rechargeable batteries after the battery reaches full charge. Overcharging occurs when the device or battery is plugged into a charger after full charge has been reached and may reduce battery life.
Can NiMH batteries explode?
The biggest danger with NiMH is overcharging. At elevated voltages, the negative electrode evolves hydrogen. Heat is also generated during charging, and as the heat and voltage increases, so to do side reactions that produce oxygen, so you end up with cells that are pressurized and contain an explosive atmosphere.
How do you know when NiMH battery is fully charged?
The way the charger knows a NiMh battery is charged is the “delta V” which is the amount the voltage has to drop from any peak for the charger to turn off (or change to trickle). The standard is 3 mV or . 003V but some chargers use a bigger one.
How do you tell if a battery is NiMH or NiCd?
If the cell is good, you should know, by the capacity and size of the cell, what the chemistry of the cell is. If the batteries have a covering on them and it’s green, then it’s NiMH. Unless it’s a Sanyo or Panasonic industrial NiCd cus a lot of them had green wrappers too .
Do Nicad batteries go bad?
The shelf life for nicad batteries is 36 months, according to Panasonic, (formerly Sanyo). Our experience is approximately 18 months. While we’ve seen nicad batteries that last past 18 months, they usually require many charge/discharge cycles to get it to perform at 80% capacity.
What is the difference between NiCd and NiMH battery chargers?
NiCd are a bit more forgiving than NiMH in charging. They can generally take higher charging currents and are more tolerant of trickle charging, although even most NiCd don’t want to be trickle charged long term. The end of charge is trickier to decide with a NiMH. Most NiMH chargers are therefore “smarter”.
Can I replace NiMH with lithium ion?
In general 1 Li-Ion cell replaces 3 NiMh cells in series, so in theory it should work. The details may be a problem because while there is a self discharge rate associated with NiMh cells, and they can handle some degree of overcharging, Li-Ion cells can’t.
Which is better NiMH or lithium ion?
Li-ion Pros Reliable: These have a significantly lower self-discharge rate than a NiMH battery. Small: They are smaller and lighter compared to NiMH batteries. Higher Voltage Output: A single cell can deliver 3.7v while even two NiMH cells can only give 2.4v.
What is the difference between NiMH and mAH batteries?
For example, NiMH batteries are preferred over NiCD batteries because they typically have a higher energy density, which translates to longer run times. It is also preferred because it does not suffer from the memory effect. The mAH rating of a battery is just about capacity.