ROLAND Rechargeable Amp Power Pack (BTY-NIMH/A) – Official Rechargeable Battery Pack for Select Roland Amplifiers including CUBE Street EX, AC-33, KC-220 and BA-330. Longer Runtime – More Output Power

Excellent facility for my Roland AC-30 amp. A bit expensive for what it is - but appears to be very good quality.

Great idea it would save messing about with batteries. But it is very overpriced. At the end of the day it is just a power bank.

This is a clear step up from operating your Roland Cube (mine’s an AC33) with regular batteries or trying to source AC mains, especially outdoors.Looking very neat, it attaches in place of the battery tray supplied with the amp and can be charged in situ, although the amp may not be used when charging.This battery pack delivers sufficient power to enable the amp to produce almost the same output as when using AC mains, which is a big bonus. It also obviates the need to fiddle around with the adapter and eliminates the need for a long extension cord on gigs.Overall, my calculations suggest that in the long run this is more economic than using regular cells, although for me the sheer convenience makes this a must have accessory.

To quote the manual"In the event that you leave the amp on after use and the battery keeps discharging, the battery mayover-discharge, causing the safety protection circuit to activate. The battery cannot recharge in this case." I tried, "Try unplugging and plugging the adaptor into the DC IN jack several times." again, as per the manual, 20 times, no joy, still dead. I'm thinking that I should have bought Duracells.When I plug it in, 2 LED flashes, then dead. When I unplug it, 1 LED flash after 2 seconds then dead. Unplugged and then plugged in again, quickly, BEFORE the single flash...it started charging. £99 battery...relief!.I really struggle to believe that this design got through any kind of project review, at any stage.Yeah, it works as a battery. It lasts quite a long time. If I forget to turn the amp off next time, will it still recover?I have a bit of Roland/Boss kit. I had an unqualified high opinion of Roland/Boss up until this point.If you never, ever, forget to turn your gear off, this is for you..If your battery won't charge, I hope that this works for you.

This is a welcome addition to the battery cassette which came with the amp (which I use rechargeable batteries with) giving me peace of mind that we are not going to run out of battery power part way through a gig - only tested once since purchasing but very happy so far

I bought this because a lot of sources recommend it. More power and charge time than using AA batteries, which HAVE to be the high capacity type (more expensive that common ones). In the long term, it's cheaper to use this. You could maybe keep the cassette with AA batteries as a back up.

En abril de este año compre la batería para utilizar con el Cube Street sólo la cargué tres veces, pues no la he utilizado demasiado. Ayer la intenté cargar y no lo hace. ¿Cómo puede suceder esto con una batería prácticamente sin uso?.Una gran decepción con este producto. 🤷

Batterie pour différents produits Roland. Je l'utilise avec un Roland Cube Street EX. Bonne autonomie et puissance au rendez-vous

Molto bene

Bon produit, bien fini, mais il y a un truc !Quand vous la sortez de sa boite pour la recharger la première fois : surprise !On branche donc l'adaptateur Roland PSB-12U, le voyant "charge" clignote 3 fois puis s'éteint .... et ça ne charge pas !! On débranche l'adaptateur, le voyant "charge" clignote une fois au bout de 2-3 secondes puis s'éteint. Le voyant "fail" est resté éteint.Le truc : débrancher l'adaptateur et le rebrancher RAPIDEMENT AVANT qu'il ne clignote. Tout rentre dans l'ordre : ça charge et le voyant clignote (durée recharge complète environ 4h).