How Power Bank Works
Every blockchain charges a network fee in its own native token — ETH on Ethereum, SOL on Solana, TRX on TRON. If you try to send an asset without holding that token, the transaction cannot go through. Power Bank solves this:
You top up Power Bank with crypto or by card — the balance is held in USD.
When a transaction needs a fee token you don't hold, Bron sends that network's native token to your account.
The cost is deducted from your Power Bank balance.
Power Bank always delivers the native gas token of the network your transaction is on, and works on supported networks only. If a network isn't supported yet, you still need to hold its native token to pay the fee.
⚠️ Using Power Bank includes two network fees: one for Bron to send you the required token, and one for the transaction you're making.
Where to Find Power Bank
Power Bank lives inside the send window:
Click Transfer in the sidebar.
Click the lightning badge with your balance in the top-right corner of the window.
The Power Bank panel opens, showing your current balance, a top-up button, and your activity.
How to Top Up Power Bank
In the Power Bank panel, click Top up Power Bank and choose how you want to pay: by card or with crypto.
By Card
Select the Card tab.
Enter an amount or pick one of the presets.
Click Create payment link and complete the payment with your card.
With Crypto
Select the Crypto tab.
Choose the account to pay from.
Select an asset and enter the amount.
Review the network fee and the total, then click Preview and confirm.
💡 You can top up with major tokens such as ETH, SOL, USDC, USDT and BTC. The up-to-date list is always shown under Which tokens can I use to top up? in the top-up screen.
Supported Networks
Gas delivery currently works on Ethereum, Solana and TRON. On other networks you still need to hold the network's own gas token — the table in Sending Crypto lists which token each network requires.
Limits
Limit | Value |
Smallest top-up you can submit | $1 |
Largest top-up | $500 |
Most Power Bank can hold | $500, including top-ups still awaiting payment |
Total top-ups | $500 per rolling 30 days |
Uses | 30 per 24 hours, counted per workspace and per member |
The 30-day top-up window is rolling rather than calendar — it frees up gradually as older top-ups age out, instead of resetting on the 1st of the month. Once you reach 30 uses, Power Bank is unavailable for a full 24 hours from that point.
💡 $1 is only the smallest amount the form accepts, not an amount that will get you anywhere. What you actually need is the fee to deliver the gas plus the fee for your own transaction — the panel shows you the figure.
Track Your Power Bank Activity
The Activity section of the Power Bank panel lists every top-up and every fee Power Bank has covered. Click an entry to see the details: the token amount Bron sent, its USD value, and the network.
If you have questions, contact our support team via messenger on the Bron platform or by email support@bron.org.