8 PetSafe Replacement Batteries RFA-67 6v for PIF-275 Wireless Dog Collar 4 pack
I have been using this system for a number of years as we have 4 Beagles and they can go in and out as they please with the collars on no leashes except for vet visits and they don't like it at all (leashes)!!!
mophie juice pack air Battery Case For iPhone 6s/6 - (2,750mAh) Red
These are so handy only need to full charge the pack about every 4 days .I purchased one st the republican convention and was looking king to get an identical one for a friend but can't seem to locate one but I like the color snd the price was right