• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

How to measure mAh capacity of a rechargeable battery?

No you cant really measure it with a tool. You'd need it to be printed right on the battery or go look it up with the manufacturer. As far as lying about their product, its hard to prove.
I would ask on Amazon if people are happy with them and are they getting their money's worth.
 
shortylickens said:
No you cant really measure it with a tool. You'd need it to be printed right on the battery or go look it up with the manufacturer. As far as lying about their product, its hard to prove.
I would ask on Amazon if people are happy with them and are they getting their money's worth.
Click to expand...
thx.
they have 4 1/2 stars but only 300 ratings.
 
LOL at $7 for a "smart" charger AND 8 batteries. Those cells are undoubtedly junk, and it's unlikely the charger is anything special either.

Here's a thread on chargers with some good answers:

Rechargeable batteries (AA, AAA), specifically about chargers

The charger on the left is one I bought more recently when I decided to make a concerted effort to use rechargeables wherever possible. One selling point was that it could charge irregular numbers of batteries rather than the one on the right insisting on pairs (and can only do a pair of AAAs...
forums.anandtech.com

A quality charger will know when to terminate (and display metrics), and that gives you a good idea of the capacity of a cell.

The NiMH cells to get are Laddas sold at IKEA, which are rebadged Panasonics.

 
JEDI said:
thx.
they have 4 1/2 stars but only 300 ratings.
Click to expand...

If it's Amazon, it's probably safe to assume that half of those "5 star" reviews were bought and paid for with amazon gift cards and/or free product in exchange for the positive review.

Out of the remaining, you probably have some people who did "early" positive reviews before they had to chance to start experiencing problems. You'll find that problem anywhere, though.
 
manly said:
LOL at $7 for a "smart" charger AND 8 batteries. Those cells are undoubtedly junk, and it's unlikely the charger is anything special either.
Click to expand...
Yup, $7 bucks is way too cheap for any of it to be good quality.

1qi8cf.jpg
 
Pretty sure you can easily determine with a load, a multimeter with current sensing, and a stopwatch. Best thing to do is get a load that is a nice even number (like 1A or 500mA) and then just see how long it takes to go from full capacity to discharged.
 
deadlyapp said:
Pretty sure you can easily determine with a load, a multimeter with current sensing, and a stopwatch. Best thing to do is get a load that is a nice even number (like 1A or 500mA) and then just see how long it takes to go from full capacity to discharged.
Click to expand...
An electronic load that can keep a constant current would prolly be best, with a resistive load the current is going to change as the voltage drops while the battery discharges. Think most batteries though the voltage doesn't drop too much until it is basically dead so you could prolly still get a good idea of the capacity with a resistive load.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top