This item is discontinued.

The WiseWire Phoenix Rechargebable Battery is a replacement battery for Invisible Fence Power Cap ® battery.  It is an aftermarket replacement for the Invisible Fence brand collar receivers.  The Phoenix is watertight and designed to fit the R21, R22, R51 and Mircolite computer collar receivers.  

Depending on how frequently the dog tests the fence the Phoenix will operate for up to 20 days on a 4 hour charge and has been fully tested to cycle upwards of 500 times. 

Note:  This is a battery only.  It does not include the charging station.  Click here if you need the charging station. 

Features

• Fits R21, R22, R51 and Mircolite computer collar receivers
• Phoenix can last up to 20 days on a 4 hour charge
• Recharges up to 500 times
• Battery seal is watertight
• Cost effective battery solution
• Environmentally friendly
• Economical
• No special tools needed  

Box Includes

• One WiseWire rechargeable battery