Eveready® Rechargeable AA​

Well I bought a couple of these on clearance a while back  . These where rated at  1300 mah apparently these where being discontinued and being replaced by 2000 mah  versions . In my testing these  have shown a capacity of 900 mah and for there cost ($5.00 for a 2 pack) I really must recommend purchasing another battery as these probable have a worse capacity to cost ratio of any battery I have tried . The only place I have really seen these around are at dollar stores and are probably primarily bought by people in need of emergency batteries .  If you are reading this do your self a favor and buy a few spare packs of precharged batteries to avoid these as much as possible. 



Manufacture description of there new batteries 

Eveready_® Rechargeable AA​
Features and Benefits

Designed to give you 100's & 100's of charges
No memory effect
Economical power for high drain devices
2000mAh NiMH
Works great in toys and digital cameras
Works in all NiMH battery chargers
Take up to 250 digital photos per charge*

Duracell precharged rechargeable NIMH AA batteries (rated at 2450mah

Well I got some of these for christmas this year  and I can  say I wont be purchasing these for my self anytime soon . The cells that I received where rated at 2450 Mah and in my testing they  fell short of there rated capacity in my testing and only showed a capacity of around 2300 Mah .  For the average cost of these batteries you can buy 2-3 packs of some of the house brands I have tried . For now I'm going to stick with buying the North Tech batteries from Menards  . 

Sorry to make this short short but really this is about all I can say about these .

North Tech Precharged NiMH Batteries - AA Menards®

Well I bought a 4 pack of these batteries from Menards for $5.98  and so far I'm pleased with them. I had been using them for a bit and did the same test that I preformed on the Rayovac's . I used my GT Power X-Charger C6 to discharge the batteries at 1 amp  down to 1 volt each and then recharged them at .5 amp and then a second discharge . The  charger reported a capacity of 2262 Mah . I also used / Tested them in my RC transmitters and used them to power a few Toy grade cars and can definitely tell you that in the toy grade cars there is a noticeable  improvement in power and run time Vs the Rayovac's . 

I love the fact that these are precharged and ready to go like the Rayovac's I was using and have around 50% more capacity for less money . Not to say that I don't like the harbor freight batteries I tried but the fact that these just give up a little capacity for the convenience of them being precharged is what has sold me on these batteries . 

http://www.menards.com/north-tech-precharged-nimh-batteries-aa/

Manufacture description 

North Tech Precharged NiMH Batteries - AA
Model Number: AC742 | Menards® SKU: 5755841 Product Description
Ready to use right out of the package.
Holds charge longer than regular NiMH.
Designed to be used with high drain devices.
Dimensions: 4 Pack
Ship Dim: 4.38 x 3.62 x 0.5
Shipping Weight: 1.9 lbsVendor: North Tech

Chicago Electric / Harbor Freight 2200 Mah AA High Capacity NiMH Rechargeable Batteries

Well I picked up a 4 pack of these at Harbor Freight  awhile back .The positive reviews on there site for these batteries are the main reason I purchased these .I basically did the same test as I did with the Rayovac batteries by using my   GT Power X-Charger C6 to discharge the batteries at 1 amp  down to 1 volt each and then recharged them at .5 amp and then a second discharge . The capacity that the charger reported was for these brand new batteries was 2325mah . Since they seem to be underrated a bit (rated at 2200 Mah) I am quite happy with my purchase at this time . After these get some more age on them I will test again them to see how there doing .




Manufacture Description

4 Piece AA High Capacity NiMH Rechargeable Batteries

Chicago Electric Power Systems - Item#97866

Charge these NiMH batteries up to 1000 times for long performance life in your MP3 player, CD players, digital camera or any other high-output portable electronic device! NiMH (nickel metal hybrid) has replaced NiCd (nickel-cadmium) as the battery of choice due to its higher capacity. Another nice advantage is that you don’t need to drain these rechargeable batteries first to get a full charge (no memory effect).

NiMH batteries feature no memory effect, higher capacity than nickel cadmium (NiCd) batteries.
Charge up to 1000 times (charge time approx. 1.66 hours)
Longer lasting for digital electronics
Battery charger sold separately

Battery charger sold separately. This item can only be shipped within the 48 contiguous states via Standard Ground Shipping.


Specifications

   Name 4 Piece AA High Capacity NiMH Rechargeable Batteries
SKU 97866
Brand Chicago Electric Power Systems
Battery capacity 2200
Battery voltage (volts) 1.2
Rechargeable (y/n) Yes
Rechargeable up to (# of times) 1000
Battery size AA

Rayovac Pre-charged Rechargeable NiMH AA Batteries

I have been using these batteries for a while .I can defiantly say that these have saved me lots of money over disposable batteries  especially since these can be bought In a 8 pack for $13.97 at Walmart and come precharged. I try to always keep one fresh pack unopened and ready to go in case I forget to charge a set.

Recently I decided I would try a few other brands to see if there where any better deals out there but first I wanted to see what kind of capacity these batteries had to get a base line I used my GT Power X-Charger C6 to discharge the batties at 1 amp  down to 1 volt each and then recharged them at .5 amp and then a second discharge . The capacity that the charger reported with each group of batteries ranged from 650mah to 1450mah depending on there age . The oldest  group of 8 are about  2 years old and probably have over a hundred cycles through them with the newest having 2 cycles through them .

So far I have not had any complete failures but more than likely age will start to catch up with my oldest cells in the future.








Manufacture description 

Rayovac's Everyday-Use line offers your best value in rechargeable power for high-drain devices.

Model: LD715-4OPA

Features and Benefits:

• Affordable, reusable power solutions for the entire family
• Pre-charged and ready to use out of pack
• Low self discharge technology allows batteries to stay charged longer so they are ready when you need to use them
• Holds charge 3X longer than standard NiMH rechargeables when not in use
• Recharge up to 500 times
• Reduce waste and save money. Keep disposable batteries out of the landfills and save hundreds of dollars when you use rechargeable batteries versus alkaline.
• AA rechargeables take up to 300 photos* per charge when fully charged. This is 8x more digital photos than Energizer Ultimate Lithium when recharged just 25 times.
• Batteries can be used in any AA device and work in all NiMH chargers. For best results use with a Rayovac charger.
• NiMH rechargeable batteries do not have a “memory effect,” meaning that it is OK if you repeatedly recharge them after only being partially discharged. NiCad batteries have a “memory effect” and lose their maximum energy capacity if recharged before being fully discharged.
• AA cells are 1350 mAh