I've got a niche piece of equipment that's powered by a USB barrel jack. It requires up to 3 amps of power, and I'm having stability issues with both wall chargers and batteries.
I find it hard to discern which USB batteries and wall chargers will be good for my purposes, any recommendations?
Further info:
It's a portable PCR-like testing machine that can test for assorted diseases using pre-packaged cassettes. It uses a little heater to keep the cassette at a configured temperature and a sensor to detect whatever you're looking for, taking about 40 minutes.
The heater spends periods of time on and off, with the device consuming next to zero power while off. Long enough that a battery might go into a low power state. If the battery doesn't respond quickly enough when the heater comes on, the voltage drops and either bluetooth drops (inconvenient, recoverable) or controller restarts (collect new sample, start all over).
A poor design IMO, surely the heater's high power draw could've been isolated from the rest of the machine, but they're scientists not electrical engineers I guess.
I need a battery and wall charger that will be rock solid so I stop losing tests. Any suggestions of how to choose a good product are very welcome.
I am having trouble both with the terms you are using, and your diagnosis of the problem. What is a "USB barrel jack"? Batteries don't go into low power states and take time to respond.
If I had the problem you seem to be describing, that when the heater goes on, the voltage to the electronics dips, I'd go get a supercapacitor and wire it across the input so that for that short period of time it was supplying the current needed.