I have been gifted two of the following, brand new and unused. I didn’t really have a use for them but they were free and going to recycling otherwise. They were originally going to be used as a backup power supply inside a machine which has now been scrapped.
If I connect them in parallel I’ll keep the 12v and can then wire up a usbC output for plugging into. My battery knowledge is very limited so I’m not sure if it’s worth the hassle when I can just buy one of these
The batteries from RS are 12V lead acid batteries. Similar are used in the security industry. You would need a 12V battery charger.
IMO, unless you have a charger it’s probably not worth the cost of the charger. They are 2.1Ah (appprox) and would have cost around a fiver.
They are designed as back up batteries and not really suitable for deep discharge IE running 'til flat.
The other battery pack, as @milkmanchris said work very well, I use two when away as a convenient USB charging point. Charge 2 phones over night with one battery, recharge during the day. Saves taking two chargers.
I have two small chargers here that I use for my batteries on ride on mower so I wouldn’t need to buy anything then. But at a little over 4000mAh I’d only get two batteries charged for the mini2 or less than one charge for the remote. Not really worth the effort or hassle when I can have the 30000mAh one here for tomorrow.
thanks all, I’ve decided against messing about with those batteries and orderred the power bank in the link. A little over 30000mAh (7 x more capacity) and will also easily fit in a pocket/rucksack when I’m camping, plus a lot lighter!!!
I use it to charge most of my Smart Batteries (Spark, Anafi, FPV Drone, Mini2, Poweregg X, etc) when out and about, along with my USB devices. I also use it around the garden for powering various toys as it’s easier than lugging an extension cable about.
I did look at these in one of your previous posts and revisited them again today. But I decided on something a bit more portable. I do quite a bit of wild camping and fishing so the light weight and portability won the argument. I am still seriously considering one of those packs for car camping though
I bought it off Amazon about five years ago and the link I could supply goes to a “Currently Unavailable” listing. I’m sure it’s still available under a different brand name, as most of these Chinese manufactured devices are.