NitecoreF4 Four-Slot Flexible IMR/Lithium-Ion Battery Charger/Mobile Phone Power Bank/Battery Organizer

Bought as both a power bank and charger for 18650 cells only, plenty of data shown on the display, it's Nitecore quality and works very well, solid piece of kit......Happy 😃

Compact, works well, plenty of data on the display. Others have reported some parasitic drain, but I still need to test that.The annoyance, when using as a power bank: as the attached device approaches full, the charge current drops and the F4's atuo power save stops the charging a bit before it is complete.

super charging mod.good clear lcd.very good.

value for money

The charging port broke within a month

Very handy charging very good and nice powerbank with 2 USB OUTPUTS.

Being dual purpose makes it very usefull

Not a good product

After a camping trip where our battery packs died on day 2 I vowed to never be with out battery power again. I have about 40 18650 batteries I have salvaged from laptops and power tools that are in good working order so I bought this unit. I tested this out by charging my Galaxy S9. It would seem a full charge takes a little less than 2 batteries. This is fabulous as I can carry about 30 batteries with me in a storage case when we go camping. When I get home after camping I can use the many chargers (and this unit) to charge up all the batteries again for the next trip. I am also looking into a Solar battery pack, but for the time being this will have to due until I can afford something substantial. I would highly recommend this for anyone looking to utilize 18650 batteries as a power source for charging items via USB. I have been carrying this around with me in my back pack since I got it and it has gotten me out of a jam a few times when I have been away from a power source for a whole day.

...ein sehr praktisches Gerät, weil es mit den gleichen Akkus läuft, die ich auch für meine e-Zigaretten benutze. So habe ich unterwegs nicht nur eine Powerbank für mein SmartPhone, sondern auch immer Reserveakkus für meine e-Zigaretten, denn es lädt mein Smartphone auch wenn nur z.B. zwei Akkus darin sind. Ausserdem funktioniert es sehr gut als Ladegerät, weil nicht nur der Ladezustand sondern auch die Kapazität der einelnen Akkus angezeigt wird.Aber wenn man bedenkt, dass Akkus, die ziemlich teuer sind, nicht im Lieferumfang dabei sind, ist es doch sehr teuer. Wer sich vom Preis nicht abschrecken lässt erhält aber ein sehr gutes praktisches Gerät, das ich empfehlen kann.

Den känns lite 1989 i design och lcd display. Knakig i plasten, något löst åker omkring inuti redan från leverans.Som powerbank gör den jobbet bra. Har även provat att ladda batterierna, verkade vara i sin ordning.

Il Nitecore F4 è un power bank e caricabatterie molto valido sotto il profilo elettronico, opera con quattro batterie 18650 (io ho montato 4 x 3400 mAh), funziona bene ed è affidabile, però ha un PICCOLO problema che ne pregiudica l'uso in quanto lo sportello di chiusura vano batterie si apre spesso da solo, anche senza volerlo.Come si prende in mano per inserire un connettore USB e si forza per inserirlo, lo sportelletto inevitabilmente si apre.Questo rende il prodotto molto scomodo ed antipatico nell'uso.Io per risolvere ho dovuto modificare il sistema di chiusura dello sportello.Speriamo che nel tempo questo problema venga superato e il progettista trovi un sistema di chiusura più sicuro.Per il resto tutto perfetto, servizio e spedizione ottimi.

It’s great to be able to charge 4 batteries at once and the cover keeps the batteries from popping out.I did find that plugging in the micro USB was more difficult than it should be.