Nano Battery
Battery for use in LXNAV Nano or Nano3.

Replacing the battery does not affect the IGC security of the Nano or Nano3 - as long as you open only the battery compartment and not any other part of the Nano. To open the battery compartment, remove the screws from the bottom of the Nano or Nano3.  Be careful not to over-tighten the screws when re-assembling the Nano.

I recommend replacing this battery every 5 years.  If it goes too long between replacements, there is a chance that the battery will balloon (grow in size) and damage the Nano's plastic housing.  If that happens, I can replace the plastic housing here.