I loaned a temporary power supply to a young friend for supplying his equipment at Cromer beach recently. I rigged up a Yuasa 12 Volt 115 Amp hour leisure battery on a trolly to supply a small inverter. His amplifier is rated at about 100W. I did not know how long the system would work for but he told me he had used it for over 3 hours. I am pleased about that and am happy that he and his friends had a good time. Yuasa is a quality brand for batteries. There was no mains available at his party site.

Zog.