As it's a LiPo battery it will be important not to allow it to go flat. Once I fit the new battery, I will take more care than before to look after the new battery.
First of all, count yourself lucky/wise - as you did the best thing by getting your hands on an original battery.
There are no equivalents!
period.
Chord uses a very high quality battery, it is a high temperature version, because Mojo can get hot while charging and operating at the same time.
Lesser batteries would swell up and can destroy the electronics inside.
Also there are no other batteries to give true 1650mAh of power, they may claim this'n'that, but that is all it is - empty claim.
FYI the sponge serves two functions:
- insulate the battery from heating chips
- by applying pressure on the battery, the LIPO performs better.
Keeping the battery for long periods in discharged mode does reduce performance and life of LIPOs, you are correct.
however, when Mojo flashes RED, batteries are actually at 20% or so, Mr. Watts is also aware of this phenomenon and does not allow the battery to fully discharge (Mojo switches off), NOR does he charge the batteries to 100% as that is detrimental too.
100% charge corresponds to 8.4V, Mojo cuts out at 8.2V to give the batteries longer life.
It also cuts out at 6.9V.
@Steve160k
I checked mine a few months ago when it was over one year old, and I got 8.5 hours using USB input.
People say you get more through coax.