The TROLL Replaceable Battery Pack provides extended battery life for the Aqua TROLL 100/200, BaroTROLL, or Level TROLL 300/400/500/700, ideal for long-term or limited-access deployments and applications that require fast, frequent sampling.

The battery pack holds 8 field-replaceable 1.5V (AA size) batteries and can be used with vented or non-vented instruments (both require desiccant).