Is the Active 20 Lithium Polymer (LiPol) Battery Pack replaceable, or is this an integral part of the unit?

Yes – each Active 20 unit is supplied with a LiPol pack fitted.
Our 10 years of experience with the Active 10/12 has shown us that 95% of users prefer the low running cost of the LiPol packs.
For the Active 20, the LiPol packs give the best battery life; for serious endurance users (24 hours plus), we’d definitely recommend a spare.

**UPDATE November 2022 with SatMap going out of business spare batteries are no longer available**
You could use the following as an alternative solution to keep you going - https://gpstraining.co.uk/collections/gps-batteries-and-gps-power-banks/products/satmap-active-20-battery-alternative