This is a popular, small 6 volt alkaline battery. The 11A battery is commonly used to power everyday devices like remote alarms, key fobs, electronic door locks, garage door openers, etc.
This replacement GP-11A 6 volt alkaline battery is made with high quality parts and is guaranteed to meet or exceed the original equipment manufacturers specifications at a reduced price.
Needed this odd sized battery for a measuring device for rc airplanes. Found these from battery mart and were priced sensibly. Have used it once at home. Battery seems fine and hope it will last a long while.
Use it for a dog collar