I'm trying to put together a project that will run on a battery. Thus far the circuit should draw < 50mA intermittently (when being used), much lower when in standby. I expect a 10% or less usage rate (active vs standby).
I am having a seriously difficult time figuring out how to do the battery / charger portion.
I have a few criteria, which don't seem all that difficult, but putting them together has been tricky.
1. Battery must be easily field replaceable (ie hard case like a cell phone battery, not a soft lipo with a cable / cord).
2. Device must be able to work in a wide range of temperatures (nothing artificial, but it will be used outside, in any climate), and not self destruct if used outside of whatever the design range is (idiot proof)
3. Device must charge from usb port or dedicated charger.
4. No BGA or leadless parts
5. Whole thing is going to be thin, akin to modern cell phones, so the battery must be thin as well.
The biggest issue is that I just randomly selected a battery without any further information (can't seem to find much, and the vendor of this battery has given me nothing but the run-around (either the people i'm talking to don't know, or aren't allowed to help me due to the fact that i'm not dropping it directly into a cell phone they know is working.
Does anyone have a suggested battery that is well documented, self protected (over charge, undervoltage discharge, current input / current draw, whatever is needed), that would be good for this application, or where I can go to get direction on this?
I'll post my current circuit (which may or may not be suitable) as soon as I can.
Thanks.
I am having a seriously difficult time figuring out how to do the battery / charger portion.
I have a few criteria, which don't seem all that difficult, but putting them together has been tricky.
1. Battery must be easily field replaceable (ie hard case like a cell phone battery, not a soft lipo with a cable / cord).
2. Device must be able to work in a wide range of temperatures (nothing artificial, but it will be used outside, in any climate), and not self destruct if used outside of whatever the design range is (idiot proof)
3. Device must charge from usb port or dedicated charger.
4. No BGA or leadless parts
5. Whole thing is going to be thin, akin to modern cell phones, so the battery must be thin as well.
The biggest issue is that I just randomly selected a battery without any further information (can't seem to find much, and the vendor of this battery has given me nothing but the run-around (either the people i'm talking to don't know, or aren't allowed to help me due to the fact that i'm not dropping it directly into a cell phone they know is working.
Does anyone have a suggested battery that is well documented, self protected (over charge, undervoltage discharge, current input / current draw, whatever is needed), that would be good for this application, or where I can go to get direction on this?
I'll post my current circuit (which may or may not be suitable) as soon as I can.
Thanks.
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