4xspower пишут:
"Could you explain “MAX amps”?
CA and CCA have been used since 1914 as a definition for battery performance. CA is defined as a measurement of the number of amps a 12 Volt battery can deliver for 30 seconds at 32°F and not drop below 7.2 volts. CCA is the same test at 0°F. These tests were meaningful for the cars of yesteryear that had to be cranked for a long time to get started. Back then CA and CCA numbers were very meaningful; however, for mobile audio use, immediate burst output is more important. XS Power batteries, when compared to the batteries of yesteryear, deliver much more power more quickly. This instant burst energy is what we call “MAX amps”."
670 - это ток прокрутки в течении 30 секунд при 32 градусах по Фаренгейту без просадки тока ниже 7,2 Вольт. Однако оценки использования с аудиосистемами более значим другой показатель немедленного или мгновенного выхода, который они называют “MAX amps".
Как-то так...