From the graph and table below you can see that the best bang for buck in the battery world with what we had tested is the Eclipse battery form JayCar - http://www.jaycar.com.au/productView.asp?ID=SB2332
These batteries as by the far the most cost effective and have very good run time when compared to other more expensive batteries.
The big note here is to absolutely not touch the every ready general purpose batteries or the every ready heavy duty...as they are very low performers.
The current firmware version in your gates v1.13 of using the power at a rate of 48 mA an hour. The new low power version were are nearly finished testing will use only 12 mA per hour, which means you will get 4 times the life out of the same batteries. When this is ready we will send out an email with the details of how to update your firmware.
As the majority or recharge batteries are 1.2 v compared to a normal battery of 1.5 v, The combination of 4 x recharge batteries means you have 4.8 v with a brand new set. The minimum voltage required by the gates is 4.39 v so you are already close to the margin before you have started. So then the cost and benefit is not looking good for using recharge batteries. This is why we do not recommended you invest in them and the charger etc.
Performance and cost table
|Performance||Brand||Cost/battery||Hours Run time|
|1st||energizer ultimate lithium||$4.68||68|
|8th||everyready general purpose||$0.95||4.8|
Graph of performance by brand
The red dotted line is the minimum power of 4.39 v that the gates require to operate.