Some Example Real-World Battery Results
These results are from Spartan GoCams in the field in low-signal areas for both AT&T and Verizon. These are not scientific tests, just real-world results that may give you some ideas about camera battery life in the field.
The cameras were set at various times to send small and large thumbnails and some full resolution photos were requested. All cameras had 12 PowerDriver 2750 mAh internally and an external battery (either a small solar panel with a small 6V battery or a 12 Ah 6V SLA battery). Based on these results, it is recommended that you change batteries about every 6 months, or more frequently if you see the power level on the info strip on night photos drop below 5.
Some Time-Lapse Battery Results with Various Battery Setups
A GoCam was set in time-lapse mode with a 30-second trigger interval, resulting in a photo being sent about every minute. The camera was set out and allowed to run until it quit. These are not scientific tests, the various runs weren’t started at any particular time of day. This is also not an endorsement of any particular brand or type of battery.
You will not get these picture numbers in the field, as you can see if you compare the number of photos from the real-world tests above (approximately 700 to almost double that over a 7+ month period) with the results from the same internal/external setup in time-lapse mode (6200+). This may give you a general idea how various batteries compare.