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Nairaland Forum / Science/Technology / Phones / Before You Buy A "30000mah Solar Power Bank", Read This (55585 Views)
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Before You Buy A "30000mah Solar Power Bank", Read This by Kingbilo(m): 11:25am On Oct 05, 2015 |
Ads have started popping up everywhere online for so called "30000mah solar powered battery banks". Some of these powerbanks sellers even went further to claim they had powerbanks with 50000mah worth of charge.. Even 80000mah. To make the offer even sweeter manufacturers of these powerbanks have added "solar charging" to the mix. All this tech is combined with prices so low make the devices sound like manna from heaven. This post will investigate some of the claims of said powerbanks to see how true these numbers really are.. Capacity. Almost all rechargeable batteries used in powerbanks are lithium batteries The unspoken truth about powerbanks and mobile batteries (especially lithium) in general is that the tech has started reach a plateau in terms of size to charge capacity in the past few years. As such, you can roughly estimate the capacity of a lithium battery just by looking at its size. Given this moderate assumption it's about right to say a 30000mah battery fitted in a power bank should be 10 times as large as your typical phone battery. However most of the powerbanks we see today claiming to hold up to 30000mAh of charge are small enough to fit in your pocket. In reality, a battery of that capacity should look at least 3 to 4 times as large as a moderately sized phone Before you buy a powerbank always ask yourself . "Is the rated capacity of this powerbank realistic?" Now let's open a typical 30000mah solar power bank sold in Nigeria to see the true capacity of the battery inside. ![]() ![]() ![]() ![]() As you can see from the images above, the powerbank contains just two 2400mah batteries for a combined capacity of 4800mah. Not the 30000mah advertised. The true capacity has been inflated more than 6 times over. For a little perspective, let me tell you the capacity of the typical single AA battery.. 2400mAh ! .This so called 30000mah has no more capacity than two regular finger batteries you can buy from any store. Solar charging. By now I guess some of you are thinking. "Well, it has solar charging so even if the capacity isn't large enough I can just harness my free sunlight to keep my phone charged 24/7" As to whether the solar panel charges the batteries at all, I cannot confirm. You do see a set of LEDs on the side of this particular powerbank light up when the solar panel is under direct sunlight.. So you are thinking..."something must be charging right?" Not necessarily. For the science inclined, let's do a little rough calculation here to see why a solar panel that small is basically a waste of time (you can skip if you just want the results) The best solar panels you can buy will provide 230 watts of power per square metre under direct sunlight. Long and short, factoring in sunlight availability and electrical losses, you probably will not be able to charge this powerbank by solar electricity. In fact the LED charging lights will probably suck all the current produced by the solar panel just to indicate that it is charging ![]() Conclusion Before you buy any powerbanks please ensure you have a good grasp of the content of what you are buying. Buy from reputable brand names and don't fall for this solar charging gimmick. It doesn't work well enough to be viable. There are larger portable panels that do work, ![]() ![]() however they are difficult to come by in Nigeria. Please share with friends so they don't get sucked into the same gimmick. https://www.youtube.com/watch?v=RDTTz_ftj3E 116 Likes 24 Shares |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by adedayourt(m): 11:27am On Oct 05, 2015 |
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Re: Before You Buy A "30000mah Solar Power Bank", Read This by kamair237(m): 11:48am On Oct 05, 2015 |
Thank u Op.... The Enlightenment was very much needed..... 26 Likes |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by RobinHez(m): 11:52am On Oct 05, 2015 |
Order you 30,000mah power banks from Jumia for only #3000 ![]() Check my signature... *messes outta thread* 14 Likes |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Kingbilo(m): 11:54am On Oct 05, 2015 |
2 Likes |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Ameboperoo(m): 1:09pm On Oct 05, 2015 |
RobinHez:Did u read at all or u r just trying to be mischievious? 9 Likes 1 Share |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by overdrive(m): 1:17pm On Oct 05, 2015 |
Ameboperoo: Haba him no go sell his market again ![]() 16 Likes |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Chidexter(m): 1:49pm On Oct 05, 2015 |
All this things just to tell us why we shouldnt fall for fake power bank. Chai op, i give you thumbs up. 1 Like |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Kingbilo(m): 2:07pm On Oct 05, 2015 |
Chidexter: ![]() 11 Likes |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by chemmerfrank(m): 2:27pm On Oct 05, 2015 |
Cant believe people even believed that crap. It has always looked like a cheap toy from china 2 Likes |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Nobody: 2:39pm On Oct 05, 2015 |
Now I love this |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Joel3(m): 2:39pm On Oct 05, 2015 |
good one. front page worthy |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by gudluckgreat(m): 3:17pm On Oct 05, 2015 |
Thought this should get to front page by now ![]() |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Paramount01(m): 3:36pm On Oct 05, 2015 |
Can i buy tecno product 1 Like |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by abrahym(m): 3:54pm On Oct 05, 2015 |
You don spoil market for some people 1 Like |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Nobody: 4:45pm On Oct 05, 2015 |
Tnx op, Noted. |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by parrotibaba(m): 5:20pm On Oct 05, 2015 |
imagine selling a "30000mah" battery for 3k even when the 5200mah power bank I hv with me cost about 3.5k to get it. And that solar bullish!t be deceiving folks since 1990. 11 Likes 1 Share |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by segalex: 6:43pm On Oct 05, 2015 |
Thanks for the enlightenment, God bless you real good |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by kennyman2000(m): 10:32pm On Oct 05, 2015 |
Okay |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by ruem: 11:23pm On Oct 05, 2015 |
Nice one, I experienced it too after getting one at alaba. It ended in my trash, since it can't charge simple Nokia torch. SON really need to wake up. 2 Likes |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Marksule(m): 12:22am On Oct 06, 2015 |
Nice One op |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Nonybb: 12:50am On Oct 06, 2015 |
Sky Host power bank is the worse power bank to have come into this country. Dont you ever try buying it 1 Like |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by tunesoft(m): 1:07am On Oct 06, 2015 |
Ehn hennnnnnn....i said it, been along time I did physics but immediately I saw that power bank months back I knew it was fraud. Panel was just too small....didnt even charge an Ipad up to half. So I concluded no buy for me....OP u get sense 6 Likes |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by sawhite: 1:32am On Oct 06, 2015 |
Nt again first it wuz papannamdi the trader now u 1 Like 1 Share |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by lekjons(m): 1:33am On Oct 06, 2015 |
thanks op, chinko don full market.. 1 Like 1 Share |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by porrigeyam(m): 1:53am On Oct 06, 2015 |
:Dthat tin na toy na.. day just dy hawk am 4 streets anyhow |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Nobody: 1:57am On Oct 06, 2015 |
RobinHez:Ghen ghen |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by stephinnoyewole(m): 2:52am On Oct 06, 2015 |
@op Hw can I know original pb @point of sales?. Thank |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Kingbilo(m): 4:44am On Oct 06, 2015 |
stephinnoyewole: It's not possible to know for sure. But if you buy a known brand, from a reputable retailer you should get a good deal. Also refer to what I have said above about the size. Use your battery to estimate the probable size of the power bank.. For example, if the size of your phone battery is 2800mah and you want to buy an 8000mah pb, the pb should be about 3-4 times as large as your battery.. Just do rough estimates. Any powerbanks above 20000mAh will be larger than you can put in your pocket 5 Likes |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by Warlord3000(m): 6:30am On Oct 06, 2015 |
Very insightful write up |
Re: Before You Buy A "30000mah Solar Power Bank", Read This by RobinHez(m): 7:56am On Oct 06, 2015 |
Lalasticlala |
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