Repeat uses during combat
What changes
Guppy's Head supplies blue flies. With 9 Volt, its one-room charge can refill during a hostile room, allowing another use when ready.
How to approach the setup
Use the active, keep dodging, and watch the charge meter. Activate it again after it refills rather than waiting for the next room.
A practical suggestion for this pair. Check the rest of your inventory and the room before relying on it.
The caution to remember
The slow recharge needs a hostile room. Do not assume the same loop works by standing in an already cleared room.
What this teaches about a run
For a short-charge active, charge support can add uses inside one fight instead of only between fights.