First, I don't know shit about batteries.
Have you finally decided to make the switch from alkaline batteries to rechargeable batteries?
I did make that decision and started out to learn a little about batteries.
The most common consumer use Rechargeable batteries are categorized by 2 different types; NiMH Battery (Nickel Metal Hydride) and NiCD Battery (Nickel Cadmium). The working voltage on both of these types is 1.2V, whereas alkaline batteries have a voltage of 1.5v. There is no need to worry as NiMH and NiCD Batteries will work in any consumer product that takes alkaline batteries of the same size
We find two basic types of consumer rechargeable batteries:
NiMH (Nickel Metal Hydride) (The newer technology)
&
NiCD (Nickel Cadium)
Rechargeable batteries are rated with a mAh (Milliamp Hours) rating. The mAh represent the capacity of the battery. Therefore the higher the mAh rating the longer the battery will last once it is charged. A rechargeable battery that is rated 2000 mAh will power your electronic device twice as long as battery that is rated 1000 mAh.
Rechargeables are rated by mAh (milliamp hours) The higher the mAh, the longer the battery will power your device before needing a charge.
I quickly learned that a D cell alkaline battery might be rated at say 1200 mAh while a good AA NiMH cell might be 2000 mAh. That D Cell would be merely the housing for a battery with less power (run time) than a good AA.
NiMH rechargeable batteries are a newer technology then NiCD rechargeable batteries and have become the more popular choice these days.
There are 3 main differences between these 2 types of batteries.
1) Memory Effect - Nicd
batteries suffer from this issue. If you continuously charge your NiCD batteries when they are only half discharged they will eventually get a memory and you will only be able to use half their capacity. NiMH Batteries do not have the memory effect.
2) NiMH batteries have a much higher mAh rating then NiCD Batteries.
3) You can charge a NiMH battery almost twice as many times as a NiCD battery
Advantages of NiMH are pretty obvious.
Rechargeable batteries will come with very little to no charge. Once the battery is charged, they start to lose around 2% - 3% of their capacity a day, when not in use. Therefore after a month's time most Rechargeable batteries will need to be charged.
Reference above is to BOTH NiCD and NiMH.
BUT:
However there is now a new technology called low discharge rechargeable battery. This battery which also comes in all sizes will be delivered to you fully charged. As well it will only lose 15% of the capacity over an entire year.
Soooooo.... NiMH batteries with "low discharge" technology seems the way to go for devices where we insert batteries and let the device sit for a time. Flashlights and battery powered lanterns come to mind.
NiMH batteries with low discharge feature come fully charged.We recommend getting NiMH batteries for high drainage devices such as Cameras, Flashes, Radios and Flash Lights. NiCD batteries are ideal for Solar lights, remote controls and other items not requiring an excessive amount of power
Site recommendations above.
http://www.onlybatteries.com/?cat1=14Added note.
When you look on the site, you'll se that slightly higher mAh ratings are available in NiMH batteries WITHOUT the low discharge feature.
Example:
D-Cell WITH low discharge seems to be about 10,000 mAh maximum.
D-Cell WITHOUT low discharge feature seems to be 12,000 mAh maximum.
I'm sure there is a technical reason though I have no idea what that technical reason might be.
Specifications:
- Size: D
- Capacity: 10000 mAh
- Chemistry: Nickel Metal Hydride (NiMH)
- Voltage: 1.2V
- Brand: AccuPower
- Included Qty: 1
Features:
- No memory effect
- Reliable service life
- Long-Lasting Performance
- Low Self Discharge
- High Discharge Rate
- Recharges up to 1000 Cycles
- Saves you hundreds of dollars compared to Alkaline batteries
- Can be replaced in any product that uses D Batteries
Note: These Batteries come pre-charged, and can maintain 85% of their charge even after a year in storage or standby.
Above are specs on what I believe is a good NiMH D-cell battery.
NOTE:
No memory effect
Recharges up to 1000 cycles
Low discharge
I'm going to post my invoice where I ordered. In no way am I saying this is the best site to buy from or that my prices are good prices or that my battery selection is the best. The guy at this site spent some time with helping me understand on the phone and I bought batteries from him:
<th>#</th> <th>Product</th> <th>Description</th> <th>Quantity</th> <th>Price</th> <th>Amount</th> </>
|
1 |
11067 |
6969: Vanson BC1HU Universal Smart Charger
|
1 |
39.99 |
39.99 |
2 |
15576 |
8 x 12455: AA AccuEvolution 2200 mAH Nimh Battery (Low Discharge)
|
1 |
30.95 |
30.95 |
3 |
15308 |
4 x 12254: C AccuEvolution 4500 mAH Nimh Battery (Low Discharge)
|
1 |
39.09 |
39.09 |
4 |
15305 |
4 x 12255: D AccuEvolution 10000 mAH Nimh Battery (Low Discharge)
|
1 |
66.49 |
66.49 |
5 |
15608 |
12320: 14 Head LED Flashlight (Die Cast Metal) - Black
|
1 |
0.00 |
0.00 |
6 |
15355 |
8 x 12416: AAA *White* Tenergy 1000 mAh NiMH Battery (Low Discharge)
|
1 |
22.69 |
22.69 |
Shipping |
$17.30 |
Sub Total |
$216.51 |
GST/HST |
$0.00 |
PST |
$0.00 |
Total |
$216.51 |
|
As usual, as you can see from the prices above, there ain't no free lunch.
I'm hoping some of you better technical guys will add to/correct my posting.
5sub