Hello, these I have made to replace the two 12v batteries in your solar gate.. These are 24volt 7Ah .
A typical 7Ah or 9Ah battery will last about 3 or so years, and you need two of them at a cost of about $60 to $70 per pair.
These lithium ion batteries are 24v so only need one and a life of more than 10 years and they only cost $99
Size is 18x7x4cm
24v Lithium Ion battery