New and Improved! Invisible Fence Brand Compatible Battery with re-designed Japanese Battery Cell - 2 Pack

Invisible Fence Brand Compatible R21/R22/R51/Microlite Battery.New and Improved with Japanese Power Cell for Longevity!- With Your 100% Satisfaction and a money-back guarantee, eXtreme Dog Fence™ saves you money with your compatible replacement battery for Invisible Fence® Brand Receiver Collars R21/R22/R51/Microlite™- eXtreme Dog Fence™ has designed a battery that will replace your current battery perfectly in the R21/R22/R51/Microlite- With much effort placed in the making of your batteries, it is guaranteed you will get a great life expectancy out of your battery- eXtreme Dog Fence™ Batteries consist of lithium-ion and have a high energy density, also keeping the weight down from your dog's collar- With the components that make up this battery, it gives the power to last longer and have better safety factors then the normal battery and is also waterproof when placed inside of your collar with a tight rubber waterproofing seal