harrisonpatm
Member
- Joined
- Jan 5, 2022
- Messages
- 401
My wife's baby monitor's battery no longer holds a charge, so she told me to fix it. It takes a small 3s 900mah Nimh pack, so nominal 3.6V. I have a box full (100+ea) of small Li-ion prismatic cells. They're basically the same size, even a bit smaller. So I could easily hotswap it into the monitor's compartment. I already tested externally, the "new" voltage works fine. So, to sum up, it works perfectly in the space, works perfectly for voltage. Problem is charging. If I swap it in, the battery monitor will attempt to charge the lithium cell according to a Nimh profile, and I don't know what that is, even after attempting to google it .
Can someone advise whether this will work at all? I should state I just need it to charge the new lithium battery a little bit. I don't care if it's optimal charging, or whether it's bad for the battery's longevity. Only concern is that I don't want it to overcharge and explode. That's it. If it works fine for a few dozen cycles before the new battery is toast, I really don't care, I'll put in another one, I literally have a box of 100 sitting around not doing anything, and the kids will grow up eventually anyway.
I have already thought about working in a TP4056, but that won't fit in the existing case and my wife doesn't want anything external sticking out of the monitor.
It's killing me that I might have to fix the issue by PURCHASING an 8$ battery online when I have hundreds of pounds of free salvage energy storage sitting around. The pain is real.
Can someone advise whether this will work at all? I should state I just need it to charge the new lithium battery a little bit. I don't care if it's optimal charging, or whether it's bad for the battery's longevity. Only concern is that I don't want it to overcharge and explode. That's it. If it works fine for a few dozen cycles before the new battery is toast, I really don't care, I'll put in another one, I literally have a box of 100 sitting around not doing anything, and the kids will grow up eventually anyway.
I have already thought about working in a TP4056, but that won't fit in the existing case and my wife doesn't want anything external sticking out of the monitor.
It's killing me that I might have to fix the issue by PURCHASING an 8$ battery online when I have hundreds of pounds of free salvage energy storage sitting around. The pain is real.