6.1A only - Sofirn 18650 3000mAh

Oh dear, the Sofirn 3000mAh 18650 is only rated at 6.1A. No wonder the Q8 Pro only achieves roughly 8K lumens and almost 2X with Samsung 30Q’s. (Tactical_Grizzly’s measurement, and that 8K is at the very start, not ANSI)

I’m currently reviewing the D25LR and thought I’d make a battery review to go with it. The BAK N18650CK is only rated for 6.1A, and no idea if that’s a continuous rating, the datasheet just says Max Discharge Rating.

These are perfectly fine in the lower lumen models, but for everything else I would advise against it.

Sorry Sofirn, but you need to source some decent cells with at least a 10A continuous discharge rating. We’d happily pay extra for cells that perform at your flashlight’s rated output.

That does explain it. I second the notion of Sofirn including better 18650’s. LT1 should come with 3500mah, and Q8 Pro should come with 10-15A rated.

I was measuring 5 different capacity and brand batteries earlier today in a high lumen light and a 1-year-old sofirn 3000mah battery wouldn’t quite get to 6 amps. I expected it to be the worst of that bunch amp wise and it was. I have at least five other brands and capacities that I’ll do in the near future. I’ve got to rig up something different to measure voltage drop but I know they don’t do real well in the cold.

I’ll post some pics later, but the spot welding job the factory is doing is rubbish, this would reduce performance even further. They used a too high setting and blew straight through the top cap, I popped it off with a knife easily.

I’ll run the discharge tests without the button or perhaps I should spot weld on a new cap

I thought this was already a well known fact?

They change cells all the time, but it used to be a 10A cell. This one isn’t much better than the ncr18650b

I think they’ve been using the 6A 3000mAh DLG battery for nearly 2 years.

Nah, the DLG cell they were using had INR18650 written on it and it tested very good at 10A. I have the DLG 6.4A and this is much worse performance