I am trying to replace a lithium-ion battery for my Bose QuietComfort 35 headphones. I cannot find the datasheet for it. The battery is an AHB110520CPS (AHB110520) by Synergy. It is supposedly an "Advanced Hybrid Battery" which uses thinner materials than LiPo or something.
Its specs are 495mAh 3.7V, max 4.2V (I think).
I could not find a datasheet or anything about it on the net, including at archive.org. The battery model is probably about 2 years old and could be obsolete by now. The manufacturer's website has some AHBxxxxx.. battery models listed but not this one.
Other numbers found on it:
- SYNERGY MH10048-E7
- (chinese writing)
The battery has 3 wires labeled T (temperature), B+, and B-, so I don't think it has anything sophisticated inside it.
I would just replace it with a drone battery of similar capacity and voltage but I'm concerned about the charging current used for the battery. Do I have to find a battery with the same or more max charging current? I suppose I can measure the existing battery's charging current but what I'm curious about is what specs I need for the replacement battery in terms of charging current. I've read that lithium charging circuits are constant current/constant voltage (which is it?). So if the internal resistance of the battery is lower than the spec would there be a problem or not?