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Mitel 5603, 51015431 Cordless Phone Battery

OutlineModel TypeCapacityPriceOrder
Mitel 5603 battery 5603
Generic
Li-ion3.7v
1000mAh
67% longer runtime than the original battery
$52.00Cdn
($41.60US)
2 week lead time
Quantity:

The above batteries will have different model numbers on the product pages since they are after market replacement batteries which are as good or better than the originals.  The current or mAh (milliamp hour) rating of a battery is an indication of the battery capacity or how long it will last on a charge, the higher the better.

There is a $12 Cdn ($9.60US) shipping and handling charge.
90 day warranty & no questions asked 1 month return policy