Portable Lithium Battery Charger

[BoatNoobie]

So I've had a NOCO Genius 10 for 5 years or so. First impression wasn't good. It was dead within the 1st 10 seconds. It turned on, made the switch to different battery settings and then it just died and wouldn't come on. It was a Christmas gift and NOCO doesn't offer free shipping for warranty in these situations. You have to pay to return it. If I bought this myself, I would have just returned that POS to the retailer. Anyways got replacement and it's been fine since. Only issue I find is it seems to charge way slower than expected. With AGM and LifePO4.

For example I have my boat batteries at home for the winter. I was charging them up to get ready for the year. My Ionic 125 battery was at 85%, so about 105 ah left. So with this Genius10, it should take about 2 hours. Well, it took almost 6 hours to show completed on the charger. At about the 4 or 5 hour mark, the Ionic app shows 100% but still absorbing 1.9 amps.

My LiTime 100 are at 95%. So should be about 1/2 hour right. Well 1 battery at the 4 hour mark still shows charging on the charger. In LiTime app, it was still absorbing 9.7 amps and battery at 99%. Pretty sure these LiTime has always said 99% max though. I went ahead and stop that battery. Now charging the next one with similar SOC 94%. After an hour, battery app states 99% but charger still charging. Gonna let this one go 4 hours too and see if it stops . So is this normal? NOCO issue? BMS issue?

So I'm looking at a new portable lithium charger that's "better". Fast, reliable and accurate charging.

When the batteries are on the boat, I use the onboard Ionic 4 bank charger.

[DREWTICK]

https://drewcraftmarine.com/collecti...ithium-charger