22171156 nBox ACCU SET PB 2 pcs 12V/28Ah 2 monobloc batteries; sealed, rechargeable extremely low gas emission High Performance (lead/calcium in absorbent glass mat technology) OGiV batteries 12 V / 28 Ah with a design life of 12 years at 20 degrees Celcius, equivalent to EUROBAT class: High Performance. Dimensions: 166 x 125 x 175 mm (L/W/H), weight: 9 kg per unit; pole connection: M5 torque 5-7 Nm with Faston F2 adapter Features of the nBox ACCU SET PB 2 pieces 12V/28Ah   - OGiV high-rate grid plates (lead/calcium) - Equivalent to the EUROBAT high performance class - Useful service life 12 years @ 20°C ambient temperature - ABS housing and cap - Extremely low gas emission, sealed design - Low self-discharge - No transportation restrictions - 100% recyclable - Maintenance-free over the entire useful service life - Rated voltage 2x12 V / 24 V DC - Complies with DIN EN 60896 - Ventilation according to EN IEC 62485-2:2018 Additional info: the battery set must not be stored for more than two months after delivery without battery charging. The battery set must be connected to the system after two months at the latest. In case of failure to comply with these instructions, any liability or warranty claims will be rejected.