Originally Posted by

**CyberCT**
357mag1, I appreciate your feedback and help.

I'm learning, and think I finally have an idea of what's going on here. Confirm I do or correct me where I don't. I'm still learning and have picked up bits & pieces over the last two years but think I got it:

There are different mah values:

1) Charge capacity of a battery is how much charge it can take from the charger in mah, which will usually be the the highest capacity of the battery.

2) Discharge capacity, which is how much mah a battery can produce for a load. That value will be lower than the charge capacity. Now, for the discharge capacity, the discharge capacity mah values can vary depending on the load or rate of discharge. Let's use an eneloop. The charge capacity might be 2,000 mah. Under a .2 amp load, the battery might produce 1,950 mah. Under .5 amp load, the battery might produce 1,850 mah. Under a 1 amp load, the battery might produce 1,700 mah.

3) The amount of voltage a battery can supply under load. A NIMH battery such as an eneloop is rated at 1.2v. now let's say there is a .5 amp load on the battery. If it produces about 1.15v and 1,850 mah that is better than another AA battery that produces, at .5 amps load, 1.05v but say 1,950 mah? I'm still a little confused about this a little.

Would it be safe to say that a battery with a stated capacity that matches closely its discharge capacity is a good quality battery? Like if a D battery can take 10,000 mah from a charger, but as soon as a load of say 1 amp hits the battery it drops to 8,000 mah capacity, that cell isn't as high quality as a cell that is stated at 9,000 mah capacity but produces 9,000 capacity under load?

When you mentioned that your blue Tenergy cells were around 7,000 mah capacity, you were doing a discharge test of each at what, 4 amps? If you did a 1 amp discharge test should you expect a capacity of more like 9,000 mah?

Just curious, what capacity did the Eneloops show on your C9000 vs the Rayovacs, when you did the discharge?

And which of those two chargers you mentioned do you like better?