Is There Such Thing As a 9V NiMH Battery with 600 MAh?

I just bought a set of Lithium ion rechargable batteries. Here is the straight dope. Lithium Ion has a much greater energy density than NiMh. In addition, a 9v battery is made up of many cells. Since a NiMh chemestry is 1.

2v, usually they have 7 little cells in there to make 8.4v. Since these cells are tiny, they do not hold that much energy. A Lithium Ion cell produces 3.7v and so they put 2 of these in a 9v battery package. It runs at 7.

4v but that's ok for most things however it may always indicate that your battery is low. But since the 2 cells are much bigger, they can hold more total energy. The ones I have actually have a micro usb port in the bottom to charge so its sacrificing some power for convienence while still having more capacity than the NiMh. Its probably a good thing however because charging a Lithium Ion battery in a NiMh or NiCd charger will probably cause damage or explode

I want to buy some NiMH batteries for a meter, the stocked NiMH that comes with the meter is 9V 300 mAh NiMH. Looking on eBay I found several NiMH batteries which appear to be 600 mAh, here is a link of the batteries : 9V Battery

Or this link (in case the other is broken):9V Battery

However, reading on Wikipedia and other sources I found that NiMH batteries have a maximum capacity of around 300 mAh, so my question is : Is a 9v NiMH battery with 600 mAh possible?, or are they just a Chinese gimmick that claims 600 mAh without actually delivering such capacity?

P.S. I cant use Li batteries on my meter.

·OTHER ANSWER:

I want to buy some NiMH batteries for a meter, the stocked NiMH that comes with the meter is 9V 300 mAh NiMH. Looking on eBay I found several NiMH batteries which appear to be 600 mAh, here is a link of the batteries : 9V Battery

Or this link (in case the other is broken):9V Battery

However, reading on Wikipedia and other sources I found that NiMH batteries have a maximum capacity of around 300 mAh, so my question is : Is a 9v NiMH battery with 600 mAh possible?, or are they just a Chinese gimmick that claims 600 mAh without actually delivering such capacity?

P.S. I cant use Li batteries on my meter.

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