The power bank is a 300k stretch goal, which means it will be available once we reach the goal of $300,000 (we're almost there). We will then update the pledge options and will have a specific pledge for the SELFLY power bank.
If you already changed your pledge and added 20$, it's OK, there is no need to cancel, we will see to it that you get the power bank.
If you are one of the early bird buyers (pledged 79$ or 89$) and you want to upgrade your pledge to a power bank pack, you can go to "Manage my pledge" and add $20 to your total (to 99$ or 109$ respectively), don't change the reward, only increase your original pledge.
If you upgrade to a power bank pack, please write in the backer survey upon completion of the campaign, that you have upgraded your pledge to a power bank pack.