Safe, easy, fast
For 18 years, the no. 1 battery and adapter specialist
Over 1.000.000 customers

Questions? Please contact us!

Welcome to Batteryupgrade!

Batterychampion has moved to batteryupgrade. As you are used to at BatteryChampion, you will find batteries and adapters for more than 40,000 devices, but with better service, faster delivery and sharper prices.

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Harman Kardon

We sell batteries, chargers and other accessories suitable for:

Device
Partnumber

Harman Kardon Esquire Mini
Harman Kardon Onyx studio 1
Harman Kardon Onyx Studio 2
Harman Kardon Onyx Studio 3
Harman Kardon Onyx studio 4

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Reviews

Jeffrey Seeger rated us:
: (5/5)
Product:: Harman Kardon Onyx Studio 2 battery (2600 mAh 3.7 V, Blue)
General:: Will use you again.
About the product:: So far it is working well.

Read reviews from other customers

Safe, easy, fast
For 18 years, the no. 1 battery and adapter specialist
Over 1.000.000 customers

Questions? Please contact us!