oodboo Posted February 7, 2021 Share Posted February 7, 2021 I had a coffee table built for my wife for Christmas and it has lights in it to illuminate the map. I tried a little battery pack with 8 AA batteries in it but it soon broke, not sure why. Anyway, it works great off a 3s lipo but I’m not sure if this would be a good long term solution. That’s why I’m asking here, hoping someone can advise what kind of 12v ish battery would be best suited to this application. All it’s powering is the led strips and a WiFi controlled relay to switch it on and off either from my phone or google home (voice control). it’ll be on all the time, the lights won’t but the little controller board will be. Do I get a new 3s battery for it? (Old one I tested it with soon died and if I’m using a lipo I’ll buy a new one for it). Do I get something else? thanks Quote Link to comment Share on other sites More sharing options...
Stormbringer Posted February 7, 2021 Share Posted February 7, 2021 youl have to watch for low volts using a lipo mate why not just replace the 8 way aa batery holder you could use 8 nihms or alkaline aa batteries ? Quote Link to comment Share on other sites More sharing options...
Lone-wolf Posted February 7, 2021 Share Posted February 7, 2021 the safest idea would be 8x rechargeable AA dont like the idea of a lipo in the house kinda always plugged in another option could be 18650 cells 2 Quote Link to comment Share on other sites More sharing options...
oodboo Posted February 10, 2021 Author Share Posted February 10, 2021 I ended up buying a 12v lithium ion battery off amazon. Just installed it this morning so I don’t know how long it’s going to last but it works and I’m more comfortable with that than a lipo. 1 Quote Link to comment Share on other sites More sharing options...
Stormbringer Posted February 10, 2021 Share Posted February 10, 2021 Wise mate i wouldnt want use a lipo like that either Quote Link to comment Share on other sites More sharing options...
m4inbrain Posted February 10, 2021 Share Posted February 10, 2021 Okay, i hate to be "that guy", but the dangerous part in LiPos is the "lithium" part. 18650 batteries for example aren't LiPos, they still blow up spectacularly if misused. That's Lithium Ion. Remember the Samsung Galaxy Note disaster? The ones that blew up/caught fire? Lithium Ion. They have the exact same issues (can only be discharged to 3.3ish volts, lithium being reactive with oxygen etc). I'm very much assuming that your table does not have a low voltage cutoff - meaning that you very well could overdischarge that Li-Ion battery too. Point being, you should've gotten something NiMH if hazard is a concern, or lead. Quote Link to comment Share on other sites More sharing options...
oodboo Posted February 10, 2021 Author Share Posted February 10, 2021 The battery has all the protection circuitry built in. Quote Link to comment Share on other sites More sharing options...
m4inbrain Posted February 10, 2021 Share Posted February 10, 2021 In that case it should be fine then, isn't actually described in the amazon listing so i didn't know. Quote Link to comment Share on other sites More sharing options...
oodboo Posted February 10, 2021 Author Share Posted February 10, 2021 Over charge, over discharge and short circuit protection is mentioned on the instruction sheet that it came with. Quote Link to comment Share on other sites More sharing options...
Lone-wolf Posted February 10, 2021 Share Posted February 10, 2021 (edited) 9 hours ago, m4inbrain said: Okay, i hate to be "that guy", but the dangerous part in LiPos is the "lithium" part. 18650 batteries for example aren't LiPos, they still blow up spectacularly if misused. That's Lithium Ion. Remember the Samsung Galaxy Note disaster? The ones that blew up/caught fire? Lithium Ion. They have the exact same issues (can only be discharged to 3.3ish volts, lithium being reactive with oxygen etc). I'm very much assuming that your table does not have a low voltage cutoff - meaning that you very well could overdischarge that Li-Ion battery too. Point being, you should've gotten something NiMH if hazard is a concern, or lead. whoa dude, do a bit of research sorry to "be that guy" Mathew Ogbourne on youtube put a gas blowtorch to a fully charged 18650 and it took near 2 mins at extreme heat Edited February 10, 2021 by Jack Reacher 1 Quote Link to comment Share on other sites More sharing options...
m4inbrain Posted February 10, 2021 Share Posted February 10, 2021 2 hours ago, Jack Reacher said: whoa dude, do a bit of research sorry to "be that guy" Mathew Ogbourne on youtube put a gas blowtorch to a fully charged 18650 and it took near 2 mins at extreme heat lol Very real world test. How about piercing one? To be clear: they don't just go off through piercing either. Every single knob who has his mechanical vape mod blow up is due to a induced short on an 18650. To be clear: all this takes is a torn wrap. I have dozens of 18650s (and 21700s), and i use them in unregulated devices. I'm pretty (entirely) certain that i know what these cells do and what not, especially considering that i blew one up already. 1 Quote Link to comment Share on other sites More sharing options...
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