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Gear / Technical Help => Remote Power => Topic started by: H₂O on March 25, 2016, 10:55:51 AM

Title: 185Wh Battery w/ charger for only $135
Post by: H₂O on March 25, 2016, 10:55:51 AM
http://www.amazon.com/gp/product/B00YP823NA (http://www.amazon.com/gp/product/B00YP823NA)

Pretty good deal IMO - This is over 3x as many Wh as the Naztech PB15000 (which is a 55.5Wh battery)- i.e. will last 3x longer!

It has 20V, 12V and 5V outputs.
Title: Re: 185Wh Battery w/ charger for only $135
Post by: voltronic on March 25, 2016, 11:10:43 AM
Looks like a good deal.  The big plus of the Naztech is the adjustable voltage, and this one has only 3 fixed levels.  But that seems like a decent trade-off for the much higher capacity. 

What would be really nice to see in a future product like this would be to make the 20V and 12V outputs each adjustable over a range, while leaving the USB outputs fixed at 5V at the two different standard current outputs.  I'm thinking of powering two different pro recorders or a recorder and preamp, each at 12V or 16V from the same battery, eliminating the need for a distribution box.  I'm sure that total output current would be the limiting factor, so this may be a fantasy device I'm thinking of.
Title: Re: 185Wh Battery w/ charger for only $135
Post by: Hypnocracy on May 28, 2016, 07:32:01 AM
Any feedback on these? My old BatteryGeek 10-14-115 bit the dust and I'm afraid the other is not far behind.
Title: Re: 185Wh Battery w/ charger for only $135
Post by: jeenash on May 28, 2016, 09:19:10 AM
http://www.amazon.com/gp/product/B00YP823NA (http://www.amazon.com/gp/product/B00YP823NA)

Pretty good deal IMO - This is over 3x as many Wh as the Naztech PB15000 (which is a 55.5Wh battery)- i.e. will last 3x longer!

It has 20V, 12V and 5V outputs.

I bought one about six months ago. I've run 2-5volt decks and a fairly thirsty preamp simultaneously and over the course of a standard show it doesn't even drop the capacity meter one light. It doesn't seem like cheap junk like alot of the batteries out there. It is a bit heavy but still lighter than a SLA. I shut it down early during an initial test because I was confident it would last 24 plus hours straight. Check your current draw first on your devices though. I forget the specs but it is limited.
Title: Re: 185Wh Battery w/ charger for only $135
Post by: jeenash on May 28, 2016, 09:24:26 AM
Oh and I forgot to add that it is way too large of capacity to be allowed on an airplane.
Title: Re: 185Wh Battery w/ charger for only $135
Post by: Hypnocracy on May 29, 2016, 01:58:27 AM
http://www.amazon.com/gp/product/B00YP823NA (http://www.amazon.com/gp/product/B00YP823NA)

Pretty good deal IMO - This is over 3x as many Wh as the Naztech PB15000 (which is a 55.5Wh battery)- i.e. will last 3x longer!

It has 20V, 12V and 5V outputs.

I bought one about six months ago. I've run 2-5volt decks and a fairly thirsty preamp simultaneously and over the course of nuna standard show it doesn't even drop the capacity meter one light. It doesn't seem like cheap junk like alot of the batteries out there. It is a bit heavy but still lighter than a SLA. I shut it down early during an initial test because I was confident it would last 24 plus hours straight. Check your current draw first on your devices though. I forget the specs but it is limited.
20v 3amp an 12v 2.5amp....appears  to be plenty watts for the draw on my equipment...even enough for my pie in the sky recorder HS-P82 at 18 watts  >:D if ever I get one

Thanks!
Title: Re: 185Wh Battery w/ charger for only $135
Post by: TSNéa on June 17, 2016, 08:30:53 PM
More information on this battery and its maker (attractive price, too...):

http://www.alibaba.com/product-detail/MAXOAK-powerbank-50000mah-portable-power-bank_60406826833.html
http://www.kayomaxtar.com/en/
Title: Re: 185Wh Battery w/ charger for only $135
Post by: Hypnocracy on August 23, 2016, 02:17:41 PM
Purchased a K2 to take to Lockn. My second Battery Geek 10-14-115 is still going strong....but a drop from the coffee table has effected the meter an it no longer lights up...For now the Battery Geek will power the DR680...if the Battery Geek dies the light on the display goes out to indicate internal battery power.

The K2 will do Festival duty and power my Portico 5012 (and its 12 watt draw) for indoor shows...it's a hoss...not small or light.

Observations:
Power switch. Just a bump turns it and the meters on (very bright meters). I was concerned about this turning off as easy but you must hold for 10 seconds to shut down. If there is no power draw for 30minutes the battery shuts itself down . I've killed a Tekkeon by forgetting to turn it off and leaving it in a zipped up bag till I got back to it a day or two later  :( so I approve of this feature.

Power Outlet. This uses Size M, 5.50mm OD × 2.10mm ID connectors for both the 12v and 20v outlet. I've gaff taped over the 20v outlet so as not to fry my DR680. The cool thing it that it is the same size as my old Battery Geek so all my cables are compatible. Nice to not have to purchase all my power cables again.

Case. Very nice not cheap looking, holes are a snug fit in power outlet to cables.

Is there a Power Distribution Box that takes 20v and provides Multiple outputs at 12v-9v?

I know H₂O at one time built them, but, no more.
Title: Re: 185Wh Battery w/ charger for only $135
Post by: voltronic on August 23, 2016, 03:34:32 PM
This one does, but it's VERY expensive:

http://www.pro-sound.com/p/audioroot-esmart-bg-du-reg-power-distributor-with-universal-fuel-gauge-and-regulated-outputs.html (http://www.pro-sound.com/p/audioroot-esmart-bg-du-reg-power-distributor-with-universal-fuel-gauge-and-regulated-outputs.html)
Title: Re: 185Wh Battery w/ charger for only $135
Post by: Hypnocracy on August 24, 2016, 10:01:34 AM
Found this one...but only two variable voltage outputs...

https://www.bhphotovideo.com/c/product/1041774-REG/atlas_sound_tsd_dcpdv_variable_dc_power.html
Title: Re: 185Wh Battery w/ charger for only $135
Post by: H₂O on August 25, 2016, 12:19:24 PM
Found this one...but only two variable voltage outputs...

https://www.bhphotovideo.com/c/product/1041774-REG/atlas_sound_tsd_dcpdv_variable_dc_power.html

Specs look ok but:
 - it looks like the variable out is for both outputs (in other words the setting affects both outs - both will always be the same voltage)
 - it requires 24v input to operate
 - all connections are screw down terminals which would not be very reliable in the field.
 

Title: Re: 185Wh Battery w/ charger for only $135
Post by: Hypnocracy on August 26, 2016, 01:38:01 AM
Thanks H2O

Also...upon shut off of DR680...the K2 shuts down...ran 4hrs and still have all 4 lights on meter
Title: Re: 185Wh Battery w/ charger for only $135
Post by: Hypnocracy on September 02, 2016, 02:34:12 PM
Ran the K2>Tascam DR680 for four days at Lockn'...input was from Aerco MP-2 two channels line in (no phantom power or mic preamp ran on 680). At some point on Sunday afternoon the meter went down to one light. There was a one hour break before Phish...so as not to tempt fate I swapped it out for my old BG 10-14-115 but suspect I would have been fine.

Observations...I managed to kill a fresh set of AA's in the DR680 sometime between checking/packing Wednesday and setup on Thursday.  :banging head:
It prevented the DR680 from starting up with the K2 hooked up...a couple of minutes of panic until I realized the issued & dumped the AA's...not optimal with this unit but at least I was up and running. That night when I shutdown I swear the unit shut down as soon as I stopped recording. DR680 meters are back lit when on external power and I had not hit the power switch and the meters went dark...

$10 of AA's at the festival general store and this didn't happen any more...also I have not been able to reproduce this behavior at the house.

After DR680 shutdown the meters on the K2 go dark immediately, if you hit the power button again on the DR680 it powers right up to external power and the K2 Meters light up also. But, after shutdown I think the K2 stays on more like 30 Seconds instead of 30 minutes. More than 30 Seconds you must hit the power button on and restart the K2.

Hitting the power button while there is a draw on the K2 does nothing...that is comforting.

The K2 Really does require 4hrs or more to charge...

Overall I'm very happy with how it provided Festival Power. It is a Heavy Beast though...Would love to find a compact way to step down 20v 3amp to multiple 2 -12v and 7.2v (Grace V2) outputs. That way I could get a F8 and run the Aerco and Grace Pre's off one large battery.
Title: Re: 185Wh Battery w/ charger for only $135
Post by: hoppedup on July 09, 2018, 04:00:33 PM
I used a Maxoak K2 at Rooster Walk for 3 days, taping 6-8 hours a day, running two recorders (DR-60D, DR-40) and phantom power on two mics all weekend and on a second pair for one set. Also charged my phone a couple of times. It was on one light sometime late Sunday.

Thing is built like a tank.
Title: Re: 185Wh Battery w/ charger for only $135
Post by: seethreepo on July 17, 2018, 09:25:05 PM
Only run mine once so far but it’s awesome. Get one if you can.
Title: Re: 185Wh Battery w/ charger for only $135
Post by: Hypnocracy on August 12, 2018, 05:08:48 PM
I now own three K2's...

Long term review:
Of the cables I have had made everyone is the right size, but, are loose at the K2 port. Conversely, the OEM supplied cables are tighter...very strange.

I think I've got noise in the power on rare occasion from the above loose connection...from the internal battery kicking in and out to cover for the dropped power. That said, it appears to be associated with only one of the three batteries. I've taken to gaff taping the RA connector/power cable down on the unit and that appears to have fixed that issue.

Why three when one will run 2-3 days of a festival...running two stages...phone charger...running a laptop for backup at festival campsite. I'm looking for a nice 12v DC powered Desktop speaker setup for camp music...

What I miss is the security of connections, even the old Tekkeon Kycon DC Power Connector feels loads more secure. Strongly considering going V-Mount 14.4 v batteries with a DTap. Similar battery meter...voltage coming right off the battery cells (no noise from voltage step down an loss of efficiency associated with it). Some V-Mount Batteries have USB outputs too. Downside is more expensive when compared to K2 for same or less capacity and no 12v output, but, that is not an issue with my current recorder that takes up to 16v.



Title: Re: 185Wh Battery w/ charger for only $135
Post by: kindms on August 13, 2018, 07:46:06 AM
ive got 2 of these and hoping they get me through curveball

But the V3 eats power so it will be interesting. I have options and should be able to recharge 1 at some point.

I may have to run the hdp2 on AA or whatever for a while and use the K2s on the V3

i got 5 hours + on the k2 with the V3 using my 414s. i think it was down to like 2 or 3 bars before i shut off the test at home. with actives i should be fine i think
Title: Re: 185Wh Battery w/ charger for only $135
Post by: Rob D. on September 26, 2018, 12:08:21 PM
...I was concerned about this turning off as easy but you must hold for 10 seconds to shut down....

I just tested mine and it takes about 3 seconds of holding the button before it powers off. I'll dig through the manual and see if there is any kind of adjustment for this (I like the 10 second rule much better).