21700 Flat Top Battery

Great battery, no problems and takes a charge well.

I get 4-5 hours of continuous run time with the 21700 batteries. I am looking forward to seeing how they perform in the freezing temps.

Works good so far!

These batteries are a great addition to the ZulusV2, and the price is right.

Works great!

Quick and easy batteries came as expected and work flawlessly I really like the bigger battery and longer life you get from the 21700 battery

Great battery with plenty of juice to last the whole hunt. I use an extra battery to extend my time afield.

Long lasting, great battery!

Great extra batteries

I'm impressed with the battery life on my Thermnight scope. Though I haven't ran it more than a couple of hours at a time, it doesn't seem to consume much battery considering all that is going on with the scope. I can't wait until our thermal season opens next February. Some cold nights and long hunts will put them to the real test.