I have a Peltor Tactical Sport 300 and when I started changing AA batteries every few weeks I decided to buy this battery. I was pleasantly surprised to see that this battery lasted longer than 2 AA batteries and not only is it financially beneficial but I've looked around the house for AA batteries a few times and had to go to the store to get them buy more and it got annoying. I use it for competitions and I have a power bank in my bag in case I need to charge my camera and I can use the same power bank for a quick charge when needed. One problem I had is that this battery does not work because when using 2 AA batteries the pins were bent and did not make contact with this battery. I used the owl tool to pry off the contacts and haven't had any problems since. Note that the Peltor Tactical Sport 300 doesn't have a "charged" or "full" battery indicator, but using an ammeter I found the battery to be fully charged within 5 hours and stopped drawing current from the charger, so it is securely plug them in and leave them connected overnight. Overall I think these are a good complement to Peltor headphones if you use them more than once a week. , you will be glad you have this battery.
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