It's a frequently asked question on this topic:
What kind of battery are we using?
Basically, majority of the Digital Locks are operating using 1.5V AA Alkaline Batteries Only
By default, there are batteries provided inside the package of all the door locks, however, the batteries that is inside the package are normally weak or not as durable. Therefore, it comes free in the box.
Well..... Good things don't come cheap, Cheap things are not necessarily good.
We will recommend to change to new batteries! There has been many brands of AA Batteries in the market and our most recommended brand would be to use Energizer / Duracell / Panasonic
Energizer, Duracell and Panasonic Batteries are seen to be stronger and less possibility of battery leakage as tested by our customers. 4 pieces of the batteries can last the digital lock up to 15 months (depending on usage)
Battery leakage is the number 1 killer to Digital Lock Malfunction. Do check it regularly to avoid any rising issue to your lock.