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Battrey types and maintanance

Nickel-Cadmium
This type of battery must be fully discharged and then fully recharged every few weeks. If you don't do this, it will quickly lose battery life due to what is known as the 'memory effect'. The memory effect means if you don't follow the above procedure, your battery will only charge up to the percentage of the last charge.

For instance, if you discharge it to 30 per cent, it will only charge up the remaining 70 per cent. Do this repeatedly, and the 30 per cent will become unusable, giving you an effective 70 per cent charge even though the indicator will still show a 100 per cent charge each time you charge it.

Nickel Metal Hydride
Ni-MH batteries are similar to Ni-Cd batteries, although they are less susceptible to the memory effect. They also have a higher capacity.

Lithium Ion
These are the latest type of batteries, and have no real problems as far as the memory effect is concerned. The problem with these is that they lose their effectiveness if overcharged or left for a long time with a full charge. Always discharge these batteries if you're going to be storing them away.

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tao tao scooter


Rechargeable batteries, especially the Nickel-Cadmium type (NiCad) suffer from a phenomenon known as "memory". If they are routinely discharged only partially then put back on charge they will eventually "remember" this duty cycle and work only a few minutes before needing to be recharged. This can sometimes be reversed, but doing so is not always easy. The newer NiMh (Nickel Metal-Hydride) batteries have mostly overcome this problem, but shallow-cycling your rechargeable batteries is still not a good idea. It's also a possibility that your batteries are worn out and need to be replaced. Rechargeable batteries can only be recharged a certain number of times before they go bad. With top quality batteries and a proper charge/discharge cycle, you can occasionally get up to 1000 charge/discharge cycles out of them. With so much of this stuff coming from China these days it is becoming increasingly difficult to find really good rechargeable batteries.

If these are lead-acid batteries, then the symptom you describe indicates that replacement is likely needed.

Jan 26, 2014 | Toys

2 Answers

We have a Firestorm drill and have had conflicting advice on charging the batteries. which is correct flatten the battery right down or charge as soon as it loses power. ?? thankyou Colin.


There are different types of battery, the old ni-cad (nickel cadium) batts lasted longer if you let them run right down before recharging them as they had a 'memory' which meant if you charged them from half life they wouldn't charge as much after a while. The new Ni-mh (nickel metal hydrate) and li-ion (lithium ion) batterys don't suffer from this problem so you can recharge them whenever you fancy. The li-on batts don't tend to run compleetely out of charge as when tehy have lost a certain amount of power they just stop anyway. If your batt has lost some life it is possible to get it re-formatted' in some cases by having it put on a battery discharge tester. This is a bit of kit that fully discharges a battery from full in a short space of time and measures it's capacity by timing it. Because it completely discharges and recharges teh batt acouple of times quickly it can someetimes reinvigourate the batt.

Nov 05, 2008 | Dewalt DC920KA Heavy Duty Xrp 18V Cordless...

1 Answer

What is the difference between the available AA battery chemistries?


AA batteries are available in four basic varieties: Alkaline Nickel-Metal Hydride (NiMH) Nickel-Cadmium (NiCad) Photo Lithium (Li-FeS2) Alkaline and photo lithium are non-rechargeable, while NiMH and NiCad are rechargeable. Each has advantages and disadvantages. Non-Rechargeable vs. Rechargeable: Rechargeable batteries are desirable from an environmental standpoint because they are reusable. Self-discharge refers to the fact that batteries lose energy when unused and even when not in a camera or other device. Rechargeable batteries tend to have relatively high self-discharge rates, approximately 1-2% per day for nickel-based batteries. Non-rechargeable batteries generally have very long shelf lives and extremely slow self-discharge rates. This makes non-rechargeable batteries a better choice for infrequent usage. Non-rechargeable batteries are available fully charged in stores all over the world, which makes them a convenient choice for travelers or customers who have dead rechargeable batteries and no time to recharge. Photo Lithium Batteries (Li-FeS2) (non-rechargeable): Photo lithium batteries will yield the longest battery life of any AA battery, surpassing NiMH by 50-100% and surpassing alkaline by 100-500%, depending on the load. While they are more expensive than alkaline batteries, their additional energy capacity makes the cost the same or less per shot than alkaline batteries. Nickel-Metal Hydride Batteries (NiMH) (rechargeable): NiMH batteries are the lowest cost overall solution for users that take a lot of pictures (more than the equivalent of a roll of film per month) or use a lot of high-power features. The largest disadvantage to NiMH batteries is their fast self-discharge rate of 1-2% per day whether the batteries are in a camera or not. NOTE: NiMH batteries need to be completely charged and discharged a few times when new to achieve their full capacity. Rechargeable batteries will eventually fail. If you have been getting acceptable battery life and then see a decrease in life, either quickly or slowly over time, a worn-out battery may be the cause. Storing or charging the batteries in high temperature conditions will accelerate this potential failure. Alkaline Batteries (non-rechargeable): Although the cheapest and easiest to find, alkaline batteries yield the worst performance of all the chemistries in a digital camera. They lose capacity at high power drains and at low temperatures. Skiers and other winter outdoor enthusiasts may find them unsatisfactory. Alkaline batteries are frequently available in two types: High drain (ultra, titanium, maximum etc.) Regular The high drain versions are a premium product designed to operate better under heavy loads than the standard product. However, there is a trend of major brands to increase the performance of their standard battery to b

Aug 30, 2005 | HP Photosmart 120 Digital Camera

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