E.SYB E4 Charger
From Gearbest : http://www.gearbest.com/chargers/pp_359772.html
https://www.youtube.com/watch?v=YvLNCzW6uNk = Youtube Video by Z Vaper
Z Vaper has gotten overcharging ( slight ) , but I have gotten nothing but undercharging ( Thats life ) .
My appologies for not testing bluetooth myself and fully , but if I can get monitoring VIA PC working I will update the review .
AA Batteries :
My charger charges at 0.25A ( nimh ) and offers no other options .
Termination voltage is 1.48v , and depending on the state of your AA ( nimh ) resting voltage should be north of 1.4v
The charger takes it's time starting as it is determining just what battery you have installed , so AA's are just a little slower to start .
I have put quite a few batteries through the charger at 0.5A and now 0.25A . It is simply a very fast charger when compared to most other chargers on the market . It offers functionality not dreamed of a few years ago , and quite frankly it works .
2 Slots offer up to 2A charge rate
2 Slots offer up to 1A charge rate
Amazingly keeps relatively cool ( ok winter weather is finally here , so its been very cool even inside ) Haven't detected any heat at all as yet , this would probably change if charging 4 batteries at maximum rates .. ( At 0.5A and 0.25A ) I have 4 batteries charging right now @ 0.25A and the charger feels cold .
Sliders are very smooth , possibly the smoothest I have ever seen
Feels like a real quality product , ( punching well above its price at time of testing )
I don't know what everyone else expects from a charger these days , but this charger ticks all the boxes for me . 2 amp charge capability for those larger batteries , 0.25 amp charge for those smaller batteries , true charge termination , CV termination , CC for as long as possible to decrease charge time , and minimal trickle charging .
I still have some 10 or more 18650 to run through this charger , I am currently charging a 18650 @ 0.25A from 3.6v and I am looking forward to seeing how long it takes .. ( Have charged 14 18650 to date )
At this time , the E.SYB E4 charger could possibly be " The Charger " to own . I have thrown a few AA ( nimh ) into the charger and I really like the result . This is simply the best charger I have used to date , I really do like it . So far I have nothing negative to report ( Nothing ) . If you need a score out of ten , then it has to be 10 ( Yes 10 out of 10 ) ... It is really nice to see companies come out with products that make the flashlight hobby safer and more interesting .
I would like to thank May from Gearbest for making this review possible ..
Update : 31 May 2016
Ok , using a iPhone ...
1) You can change the charge current on the fly VIA the App ( Very nice ) , makes me wish you could do it on the charger .
2) You can monitor the charge progress ( ? )
Ok , pictured is my brothers iPhone ..
Showing is the results of a completed AA nimh battery . ( A B C D ) the arows show charging options for Li-ion etc ( nimh is stuck @ 0.25A )
I would really like to see a Windows / PC app for this charger ( Bluetooth ) . I believe sales potential is being some what limited by not having a Windows / PC app , heck even a Linux app would be fantastic ... I personally am not much of a phone fan boy , I don't have one super glued to the side of my face like some young people today , who would rather text than eat .. E.SYB , please ! A Windows or Linux app for PC would be crazy great .