Upgrading from a V11 to V39 on your old charger

If you have one of our bags with the white V11 USB battery, it is possible to upgrade to the higher power, higher capacity V39, but there are a few things you should know before you hit the ‘Buy’ button. …

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Source: http://voltaicsystems.com/blog/upgrading-from-a-v11-to-v39-on-your-old-charger/

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