CulaLuva JMT Tp4056 1a Lipo Battery Charging Board Charger Module Lithium Battery DIY Mini USB Port

The ones I received weren't trimmed; they still had plenty of PC board around them. These must be assembled by hand; not sure how they would fit in a reflow channel with the extra PCB around them. Otherwise, they worked fine.

You can get three of these little lipo chargers for the price of one using a different charger chip from another vendor on Amazon. That should be a great bargain but there is a catch.Not sure what the engineers where thinking when they put these together. The current programming resistor is 215 ohms which isn't even listed on the spec sheet for the charger chip. When I tried to use it as it was shipped, it put out approximately 50 mah from a USB port and the charge and charge completion lights both lit up. The circuit seemed to stop charging when the battery was around 4.1v, which isn't fully charged for a typical lithium polymer cell.I removed the 215 ohm resistor and replaced it with a 10K ohm and as detailed in the spec sheet for the chip, the circuit supplied a charge current of around 120 mah, the charge indicator light lit up when it was charging and the charge completion light lit up when the battery was fully charged at 4.2v.One other odd thing, (maybe just a cultural difference and this might make more sense wherever these are put together) the charge indicator light is blue and the charge completion light is red. Seems like it would make more sense to be reversed.Once the program resistor is "fixed" the circuit worked great but no way I can give it more than three stars since the charger requires the recipient to change components to make it work.**Update**I ordered a second batch of these little chargers and they all came with the correct program resistor (1.2k) for a charging current of 1 amp and the charge indicator LED is now red while the charge complete LED is green. I am still swapping the 1 amp resistor out for a 130 mah program resistor but if you need a tiny charger that can put out 1 amp of charge current and have the USB port capable of supplying it, this little circuit should fit the bill.Bumping this up to 5 stars as the vendor "fixed" all the issues I had with the circuit.

Tiny little charger.

Scheda perfetta con indicatore led di stato per la carica. Consigliatissima per chi lavora con Arduino e simili o per progetti che necessitano di esser alimentati tramite usb o per modulo di ricarica di batterie Lipo sia da sole che integrate in qualche apparecchio digitale. Spedizione veloce e pacchetto ben protetto.

la plupart ne fonctionnent pas et le vendeur ne vous livrera pas tout ce que vous avez commandé, et remplacera ce qui manque par autre chose,A FUIR ABSOLUMENT !!!je suis en train de galérer pour me faire rembourser et/ou livrer ce que j'avais commandé c'est à dire des chargeurs lithium fonctionnels.

carica la batteria in tempi ragionevoli ed e' economico e compatto: attenzione solo che questo e' il modello per miniUSB e non microUSB

Solo necesitas conectarlo a un puerto USB por un extremo y un portapilas en el otro. El único problema que tiene es que si te equivocas con la polaridad de la batería deja inservible el cargador.

va benone, fa quello che deve fare, si ferma automaticaments quando la tensione ha raggiunto il valore nominale. scalda un po con le alte correnti.

Habe die kleine Platine gekauft um eine Handleuchte auf Lithium-Polymer Akku umzubauen die mit USB geladen wird.Die Platine sieht Qualitativ sehr hochwertig aus. Meine Lampe funktioniert damit super.Was will man mehr zu diesem Preis.

Bon produit de qualité. Bon simple et rapide à installer. Le rapport qualité prix est bien. Je trouve se produit correcte.

Excellent matériel pour un prix des plus raisonnables. Livré dans les temps.

Ottimo prodotto; inoltre la spedizione giunta in Italia diventa raccomandata con servizio di giacenza che è molto utile per il ritiro in base alla disponibilità

Parfait pour l'utilisation que je dois en faire. de très bonne qualité malgré un petit prix. je le recommande vivement.

super produit que j'ai reçu rapidement , produit conforme a l’annonce , par contre au début de la charge il chauffe fort

A duré 2 jours puis poubelle

Marche comme convenu, possibilité de l'alimenter soit en USB soit avec un courant continu DC charge les éléments 1S 3.7v

mais aucune protection . Ne supporte aucune fausse manoeuvre .Mais correctement utilisé cela fonctionne très bien .Je n'ai pas mis la note maxi pour cela

Ne charge pas a 4.20v les 18650 la charge s'arrete a 4.08v malgre tous les chargeurs secteur utilises la lumiere vire au bleu indiquant la charge complete