[Repeater-Builder] Best batteries for repeater sites

[Kerincom]

Hi guys .Can anyone suggest the best type of batteries for repeater sites 
It seems our ordinary lead acid batteries are surviving better than optima
yellow tops  over 2-3 days of rainy weather.would anyone have any other
sugestions
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au