AAA 'Good To Go' rechargeable battery test.

dragonfruit

I have tested 8 Good To Go AAA batteries using analyzer, which follows the IEC standard for determining battery capacity.
These are the test results:
1 "Good To Go" 660 mAh
2 "Good To Go" 665 mAh
3 "Good To Go" 673 mAh
4 "Good To Go" 658 mAh
5 "Good To Go" 660 mAh
6 "Good To Go" 648 mAh
7 "Good To Go" 659 mAh
8 "Good To Go" 647 mAh

So, they have 16-19 % less capacity than advertised 800 mAh.
Mind though, that also other brands usually have less capacity than their 'face value', but usually the difference is not more than 5-7%.
Only the green BTY batteries, supposedly 2500 mAh, purchased on eBay, did not follow that rule, as they really had only 201 mAh and 191 mAh capacity, i.e. 92% less capacity than their 'face value'.

Weight:
AAA "Good To Go" 11g
AA BTY 2500 21g, the other one 22 g
AA Sanyo Eneloop 2000 mAh 26 g
AA Sony 2700 mAh 30 g

AA Panasonic Ni-Cd 800 mAh, 20g, another on 21 g

AAA Kendal alkaline 12 g
AAA Hengwei non-alkaline dry cell Super heavy duty 8g

AA Duracel alkaline 24 g
AA Sony alkaline 23 g
AA Panasonic alkaline 23 g

Clowance

but you don't say which make the highest mAh (whatever that is) was? (Only that the lowest was off ebay). And what relevance is the weight?
Sorry I am a non techie and don't fully understand.
I think the gadget show did a battery test a while back and there were substantial differences but cant remember the results now.

dragonfruit

Clowance wrote: »

but you don't say which make the highest mAh (whatever that is) was? (Only that the lowest was off ebay). And what relevance is the weight?
Sorry I am a non techie and don't fully understand.
I think the gadget show did a battery test a while back and there were substantial differences but cant remember the results now.

This is supposed to be a test of only 8 AAA "Good to Go" batteries, not a comparison between brands.

Some people weigh batteries to find out how much air manufacturer put in them instead of 'good stuff'. I think weighing is very unreliable, as battery wrapping plays a significant role, but anyway for people who do not have battery analysers it might be a method for spotting such poor batteries as BTY, which are much lighter than other of similar declared capacity.