Topic: Looking for external battery for Roland R-44 or R-26

[charlesqian]

Hi everyone, I have been looking for some external battery for Roland R-44 or R-26.  I have searched online extensively but cannot find any definitive answer.  I am looking for some battery pack that is ready to go without the need to do any modification on the cable.  Since R-44 and R-26 use reverse polarity, the center pin of the plug is negative.

I highly appreciate any input.  Thanks a lot.

[chinariderstl]

Not sure if this will work or not, but I just scored one of these for my Tascam DR-680.  It comes with a lot of attachments.

http://www.amazon.com/Naztech-PB15000-Universal-Charger-Extended/dp/B007URKIGC/

I realize you are looking for an "out of the box" solution, but should you not find one, it is likely that Ted (tgakidis) can make a cable for you.  I buy all my cables from him, he's good people.

http://taperssection.com/index.php?topic=133186.0

HTH

[pdxdanmusic]

You might want to check out this battery it is straight 9v so no messing around with anything for the correct voltage and it does but out 2 amps. I like that they rate it at the 9v output to give you a honest idea on how long it will last. You would need to get a reverse polarity cable made .
http://www.bixnet.com/bx948.html

[kenyee]

You could also get one of these to power that and other devices:
  http://www.paulcbuff.com/vm120.php
It's fairly light and compact for a portable power source.

[cashandkerouac]

i use the Battery Geeks 9/12-66 (http://www.thebatterygeeks.com/BG-9-12-66-Portable-DVD-Player-Battery-p/9-12-66.htm) with my R-44 and love it.  it has a 9v and a 12v setting via a switch on the back of the battery.  the R-44 will run on either the 9v or 12v setting with no difference in performance.  it's also pretty light and doesn't take up much space in the bag.

i also recently picked up a Bixnet BP160 (http://www.bixnet.com/unpowbat.html), but haven't used it in the field as of yet.  it has a 12v and a 19v switch on the top so it's compatible with the R-44 on the 12v setting.  the 19v setting can be used to charge your laptop (if that's a desirable option for you).  the Bixnet holds a lot more juice than the Battery Geeks 9/12-66, but the Bixnet is also HUGE and will take up a lot more space in your bag.   

the Tekkeon MP3450 could also be a good option (http://www.bhphotovideo.com/c/product/503090-REG/Tekkeon_MP3450_MP3450_myPower_ALL_Universal.html).  it has multiple power options from 5v to 19v, but some recorders (i.e. Tascam DR-680) don't play nice with the Tekkeon.  i've never used mine with the R-44 so i don't know if there have been any issues.  i primarily use my Tekkeon to power my Aerco MP-2 on the 7.4v or 9v settings and it works great.  i have also found that the Tekkeon is great for powering my vaporizer at shows, so it is definitely a versatile battery.

[cashandkerouac]

i use the Battery Geeks 9/12-66 (http://www.thebatterygeeks.com/BG-9-12-66-Portable-DVD-Player-Battery-p/9-12-66.htm) with my R-44 and love it.  it has a 9v and a 12v setting via a switch on the back of the battery.  the R-44 will run on either the 9v or 12v setting with no difference in performance.  it's also pretty light and doesn't take up much space in the bag.

i also recently picked up a Bixnet BP160 (http://www.bixnet.com/unpowbat.html), but haven't used it in the field as of yet.  it has a 12v and a 19v switch on the top so it's compatible with the R-44 on the 12v setting.  the 19v setting can be used to charge your laptop (if that's a desirable option for you).  the Bixnet holds a lot more juice than the Battery Geeks 9/12-66, but the Bixnet is also HUGE and will take up a lot more space in your bag.   

the Tekkeon MP3450 could also be a good option (http://www.bhphotovideo.com/c/product/503090-REG/Tekkeon_MP3450_MP3450_myPower_ALL_Universal.html).  it has multiple power options from 5v to 19v, but some recorders (i.e. Tascam DR-680) don't play nice with the Tekkeon.  i've never used mine with the R-44 so i don't know if there have been any issues.  i primarily use my Tekkeon to power my Aerco MP-2 on the 7.4v or 9v settings and it works great.  i have also found that the Tekkeon is great for powering my vaporizer at shows, so it is definitely a versatile battery.

a brief update regarding the Bixnet battery... i powered my R-44 this weekend with the Bixnet set to 12v to see how long it would last with a full charge.  this test was done using a stereo pair of mics (ck5 > 451eb) connected directly into the R-44 (channels 1 and 2, +48v phantom power provided by the R-44).  the R-44 was set to record at 16 bit/44.1 kHz with a 32gb SD card so i would not run out of storage space.  total runtime was 28 hours and 21 minutes.  not too shabby.   

i'm going to run the same test today with a Battery Geeks 9/12-66.