₦airaland Forum

pato405:
Yes. There is a red, blue, and green LED lights on the silicon board. Watch the video. The moderator explained it: RED: Current comes in & is recognised, blue charging commences, Green; Battery full. SO once it's green, you can unplug it. I wonder why we didn't adopt this approach all the while on this thread. I have more than 4 functional laptop chargers in my store wasting away! . All I needed was the DC step down for 2k. I would have saved a whopping 12K for a weekend groove! chai

the green light doesn't stop the charging process which means you have to unplug manually

teamsynergy:
mehn.. we dey get 10hrs straight lately for my area oo... buh we shoulkd be able to build a battery full cut off circuit , i just dont know if the powerpack is gonna charge 200ah battery without overheating and damaging the board. its kinda easy to fix laptop powerpack sha. its one big capacitor inside that usually gets damage, once replaces, the powerpack is go to go again...




nb: i think a diode might be necessary at the output side of the dc converter to block reverse supply from battery..
if the voltage is kept at around 13.7-14.4v with 4-5a, i doubt if that is ever going to over charge any deep cycle battery from like 60ah upwards, at most its gonna jst tickle the battery ( float charge)

its a ac to DC system you don't need diode again it back to ac . its a DC step down a DC converter is called inverter

vansledge:
pls this DC step down device, is it smart enough to stop charging when the battery is fully charged?
cc:
pato405
ceejay80s
teamsynergy

no but I bet phcn cannot give us 10hrs straight power supply

pato405:
Yes! exactly the type in the picture earlier shared. Wish I learnt this method much earlier when I was coupling my inverter system. Wouldn't have spent over 14k buying the miserable 'made in china' chargers.

Now needed is a multimeter. Haven't got cash to spare on that now. I bought one sometime ago but lost it carelessly after barley 1 week.

where did you get it the guy I asked has been telling me he has not gone to market.

pato405:
Coupling the device with your Laptop charger is absolutely a much cheaper way to charge batteries than buying the overpriced suoer chargers and other funny chargers. I saw it for N2,500. There are some with capacity to output up to 20A!

OP, oya publicize to others. It's a good money saving mechanism. However, Solar panels have taken over as PHCN has vehemently refused to supply power. We've been in the dark for more than 4 days now in my area and my bad charger has worsened the matter.

Actually yes . most repairers don't actually know the device only few do. did you say u have gotten the step down?

ceejay80s:
since u hv gotten one what? babe oku ?

I guess 1 pack of c way (nutri c)

pato405:
Can you recommend a seller? I've searched for it everywhere.

go to these radionics and electricians tell them you want to buy DC step down

am happy I have just gotten 1 like since my adventure to nl

[quote author=teamsynergy post=56860642]thanks... will the PSU supply 12 volts or 13-14v cos that what is required to charge a 12v lead acid battery....[/quote
12v is the highest this can supply but sometimes go to 12.7

pato405:
Thanks will keep trying. @bolded, are you saying it's possible to couple a charger with a transformer and a rectifier? How safe is it for the battery life as it's not smart?
What's that in-between the laptop battery & the alligator clipper wires? Sorry I couldn't watch the clip as my office wifi is barred from relaying videos during office hours. Is that a DC to DC step down converter as shown:

yes there are various brands its a dc step down . it is needed because the charger itself is 19v. any volt ranging from 12 to 13.4 is suitable for 12 v batt

teamsynergy:
could u share some links??

https://www.youtube.com/watch?v=sGYPHbEBmfw&itct=CA8QpDAYACITCJuVjf_ditQCFcmDVQod2MYMAzIHcmVsYXRlZEjm85b-xN_Qxv4B&client=mv-google&gl=NG&hl=en

https://www.youtube.com/watch?v=_H-kvo9NQpI&itct=CA4QpDAYASITCLqRotHeitQCFdCzVQod2SAIiDIHcmVsYXRlZEj8s4aI2-ODs7AB&hl=en&client=mv-google&gl=NG
you can buy a power pack with up to 18 to 20a 12v rating

teamsynergy:
will it charge acid lead batteries ?cos they once,av seen only charge lithium polymer batteries

charges lead acid life po lithium ion so far they are in 12v

ceejay80s:
YES!!! VRLA

thats quiet a piece of bomb . anyway you are a techguy . I have seen on video on YouTube for like months and I will like to share it here though I have been on nl for long this is the first thread am saying a dam you guys like me (stingy and techy ) can make our 12v 20ah bat charger from a desktop power pack at least its giving me what I need.

ceejay80s:
12v system.
from day one,all my batteries are tokunbo, except the brand new 100ah saint2ace bought for me ,they have all been working fine together,i am going to add distilled water to them soon

are you using vrl batteries?