The BP24 consists of a 24 Ah battery and a cable, along with a mounting bracket that can attach the battery to the diamond-punched backplates in Campbell Scientific enclosures.
The BP24 with a CH100 and a 10 in. by 12 in. enclosure with special mounting brackets is equivalent to a PS24.
The PS24 includes the BP24, a 10 in. by 12 in. enclosure, voltage regulator (CH100), back panel, mounting bracket and strap, and a longer power cable—all in one. The PS24 may be a suitable option when installing the battery in a separate enclosure because the data logger’s enclosure is not large enough to house the battery. The PS24 is often used with the ET107 when a larger battery is required.