HIGH TEMPERATURE 2 Pack - 12V 9Ah BATTERY APC BACK-UPS XS1500 RBC109 PS-1290 PowerStarĀ® BRAND - BETTER WARRANTY - BETTER BATTERY 12V 9AH HIGH TEMPERATURE BATTERY BUILT FOR THE HEAT IN HIGH TEMPERATURE ENVIROMENTS AGM, 12V, 9.0AH L- 5.94 W- 2.56 H- 3.66 PowerStarĀ® Brand batteries Batteries are shipped charged and ready to install. Storage temperature ranges: around 5 - 104 degrees F Operating temperature ranges: around 32 - 113 degrees F The high temperature battery will actually increase its run time when put in warmer environments. The battery exceeds its quoted 9AH capacity by about 4% when over 100+ degrees. This will actually give you a longer run time when placed in warmer conditions. These PS12-9-HT batteries also have deep discharge characteristics, meaning that the devices can drain these batteries down to nothing left, and there will not be any continual loss of power. The batteries will charge right back up to their optimal charge levels. The batteries are extremely rugged and durable, maintaining their charge much better in the high temperature range.