This extended battery pack is user-replaceable and allows up to 136 hours using dynamic update rate.
Compatible with T20 and TT25.
Garmin Extended Battery Pack for T20 and TT25
by Garmin
SKU 13023-00
⚠ CA Prop 65 Warning for California Residents
⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to CaProp65Warning