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Complete review of the ML-102 v7.1 (Ordered 16/9/14)
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#1 (permalink)      10/9/2014 4:07:14 AM US Central   quote/reply + tips
3months
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Complete review of the ML-102 v7.1 (Ordered 16/9/14)
I posted this review in BLF but in separated posts, here I've joined all my posts together for a complete and detailed review of the Miller ML-102 ordered on 16/9/14, unit received is v7.1.


GENERAL OBSERVATIONS
-Same terminals as V5.0, perhaps a protected cell could fit, but I wouldn't recommend it.
-With nothing plugged in, just the battery, blue led stays on dimly and standby current is 0.2mA.
-Unit is well built and the soldering is very clean.
-Two new chips on the V7.1: MT5032A (Output) and ETA6002 (Charging), see picture:




This is the led that stays on when you put in a battery, hardly visible with the case on.




AS A POWER BANK
-Auto turn-on with the slightest load, my USB power meter turned USB output on.
-Doesn’t turn off USB output as long as there is a load.
-USB Max charge (output) rate is 1.8A, tested for 3 minutes and didn’t drop. Gets warm.
-With a fully charged Panasonic 3400 it was able to deliver for more than 2 hours 5.02V 0.98A without any drop until the battery reached 3.25V and it shut off. It was drawing 2A towards the end and the battery got warm. Let the cell rest a while and put it back, was able to squeeze another 5% charge into the iPhone 6. About 120% total delivered charge.

-Efficiency of the ML-102, charging an iPhone 6:
IN: 3.93V 1.50A = 5.85W
OUT: 5.05V 0.98A = 4.95W
About 85% efficiency, not bad.

Charging a power bank, it will take up to 2A, but max output is 1.8A.




AS A 18650 CHARGER
-USB draw (input) when charging a depleted Panasonic 18650B cell is 1.12A.
-The charge current to battery is maintained at 1.25A until it reaches 4.0v. Not true CC/CV, but huge improvement over the earlier version. No true CC/CV means longer time to finish, but it charges just as good.
-4.18V termination, after 15min resting voltage was ~4.16.
-As expected, efficiency of the charge increases as Vout gets closer to Vin (as the battery fills up).


Readings while charging a Panasonic NCR18650B 3400mAh:







BOTTOM LINE
The newest version of the Miller ML-102 just got better. It can now produce an output enough to charge an iPad, and being very efficient as a 18650 charger. I've been using my unit thoroughly over the last two weeks and I'm very impressed with its performance. For the price it does everything I expect it to. I would qualify it as excellent.

RATING:





Edited on 11/1/2014 at 7:48 PM. Reason:
#2 (permalink)      10/9/2014 4:27:17 AM US Central   quote/reply + tips
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mccmick
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@3months the sub-description says:

for 16340 / 14500 / unprotected 18650 batteries


Oh, and welcome to the forum

When I was younger I used to go skinny dipping. Now, all I can do is chunky dunking.
#3 (permalink)      10/9/2014 4:39:33 AM US Central   quote/reply + tips
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Thanks, I've been here a long time, but just recently registered.
#4 (permalink)      10/9/2014 5:16:29 AM US Central   quote/reply + tips
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mccmick
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I love the "charger doctor" you are using - I had previously put it in as a new product request but still waiting :(
When I was younger I used to go skinny dipping. Now, all I can do is chunky dunking.
#5 (permalink)      10/16/2014 8:09:07 AM US Central   quote/reply + tips
Mandragoras
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I've also received the v7.1
My two cents:
It charges up to 4,18 volts. As a power bank it does a very good job. It can supply high current and sustain output voltage. The pointy bulges on the negative terminal cause damage (scuffs) to my normal sized unprotected cells.
#6 (permalink)      10/25/2014 12:55:40 PM US Central   quote/reply + tips
mesteken
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3months wrote:

Just to confirm my ML-102 ordered on 16/9 came with V7.1 board. But still cannot accept protected cells... Button top cells do fit.USB out pushing 1.8A @5V stable, amazing.Charging @1.12A, not bad.



Hmm it's weird, I have 7.1, and it support protected batteries (height 67mm): SKU 1345500
The batteries are put very tightly, but fit.


Edited on 10/25/2014 at 12:57 PM. Reason:
#7 (permalink)      10/26/2014 1:28:04 AM US Central   quote/reply + tips
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Hey guys I just updated OP with my final review of the ML-102, it was initially posted at BLF in separated posts, I've unified everything now. Hope it helps =)