5V Mobile Power Supply USB Battery Charger 18650 Box

A great buy!!! It came to Rostov-on-Don for a month without treka.Instruktsiya-find adapter from D-face-5 volt 1 amp, bought on the market for 150 rubles yusb 10-point diagram with mini and micro yusb, cut an extra connector to the adapter is attached. The result was a universal reverse inzhinirigovaya charge-PoWER bank!! and here and there!. PoWER bank is charging this mini-jack and a mini-yusb.Vyhod one standard yusb! prismene akkov, you should click on the small rectangular button board, or zarabotaet.Voobsche not bought it to charge akkov 18650-TC is smart!, and the price is cheaper than the miller and much more versatile!

Отличная покупка!!!!!!! Дошло в Ростов на Дону за месяц без трека.Инструкция-нашел адаптер от Д-лика-5 вольт 1 ампер,купил на рынке за 150 рублей юсб 10 хвостку-с мини и микро юсб,отрезал один лишний разьем,к нему подключил адаптер.Получилась универсальная реверс инжинириговая зарядка-повер банк!!!!И туда и сюда!!!.заряжается эта повер банка-мини джеком и мини юсб.Выход один-стандартный юсб!!присмене акков-надо нажать на плате прямоугольную мини кнопку,иначе не заработает.Вообще купил эту штуку для зарядки акков 18650-тк она УМНАЯ !!!и по цене дешевле чем миллер и гораздо универсальней!

Нормальный,рабочий девайс, который можно заряжать через microUSB и от USB3.0 порта заряжается за 3-4 часа.
встроенный диод имеет 2 режима свечения,что удобно использовать ночью
максимальная емкость в 12 АЧ даст фору любому Power bank )
Пока использую банки от старого ноута, но если suntekstore предложит ассортимент литиев, то возможно куплю замену

Штуковина очень полезная при длительных выездах на природу. Доставили на Украину за 24 дня. Советую всем, кто хочет оставаться мобильным вдали от цивилизации!

I'm happy with the product and delivery time. It cost me under $7 to use it as power bank for my S3 lte and other smartphones. I'm using it with 18650 from my more than 7 years old laptop battery. The built quality is fine but it does the job that supposed to be. The battery recharging time is also not bad. It only takes 4 to 5 hrs to charge 4 x 2400mah batteries.
Overall, I'm happy with the product. ;)

How do I get the status lights to operate? I bought two battery packs and am using two different sets of 4 batteries in each. The packs works just fine but the status lighs never come on from fully charged to fully discharged.

Thank you
Mark Kallas

Hello Again, What is the function of the internal micro-switch on PCB ?? Looks like you need to push every time you insert battery cells.

Thank you, Michael

Hello, Since Li-Ion battery cells have a discharge cut-off voltage, what voltage does this unit stop at ?? (some cells have cut-off at 2.75 volts or slightly higher)

Thank you, Michael

I will try to answer some of the questions and provide some additional information for the product.

CELL PROTECTION
You can use both protected and unprotected cells in thuis product, but avoid using batteries with a different charge percentage! I recommend using only batteries of the same brand in the same condition to avoid one cell charging another, this could possibly lead to cells becoming hot and fire/explosion. The charging process stops at max. 4.22V, which is exactly where it should stop. I have not tried if there is a low-charge-protection, but I think so. There is no overheat protection, so stay close to the cells and monitor the temperature every now and then, especially when charging in this setup for the first time. If it gets warm, better unplug the charger and let them cool down before you continue.

LOADING CURRENTS
I measured both charging currents. The chip responsible for charging the products internal batteries supports up to 1A loading current, which with 4 average cells (2200mAh) takes ~9hrs to fully charge them.
It does not matter, which input you use for charging, they are internally connected. If you find a power suplly with the round plug just make sure it is rated at 5V DC with a minimum of ~700mA or better 1A.
The output current is specified to be 1A too, but I measured currents up to 1,75A, but it probably wouldn't charge for a long time at this rate. So I think 1A is realistic.

PHONE COMPATIBILTY
This device does not short the USB data pins, which would help charging some phones. So if your phone is not charged (or charged painfully slow) you can try the following:
Open the case, bend up the circuit board. Below the USB out connector you will see the 4 pins in a row. Connect the second and third of them either by bending them to each other or by soldering. Do this at your own risk, it could break your battery pack and/or phone!

STATUS LED/FLASHLIGHT
the 3 LED indicate battery state. The green LED just glows very dimly, that's normal. While 3 LED indicate a rather fully charged battery pack, less LED mean less energy left. The indicator is more accurate, when there is no device connected and the switch turned off, because the 'flashlight' and phone charging drain some of the power.

I hope my information is useful for you; I just want to thank SunTek customer support for their great service with delivery problems and hope they appreciate my info given here.

Disclaimer: All information published here apply for my 2 boxes, and were found out by myself using a digital multimeter and data sheets of the manufacturers. I can not guarantee that there are no faults in there.

Are the 4 batteries loaded in Parallel? Or in Series?
Can you simply use 1 battery? Or are 4 required?