ABYSS® 12V 350Ah Group 8D Battery Data Sheet

ABYSS® Group 8D 12V 350Ah Dual-Purpose Lithium Marine Battery

General Specifications

Physical Dimensions  20.47" x 10.59" x 8.66" ( 521 x 267 x 220 mm)
BCI Group Size Group 8D
Weight  76.0 lbs (34.5 kg)
Water Rating IP65
Terminal Type  M8 x 1.25"
Terminal Torque 80-100 in-lbs (8-10 N-m)
Case Material Acrylonitrile Butadiene Styrene - Flame Retardant
Cell Type LiFePO4

Electrical Specifications

Nominal Voltage 12.8 V
Nominal Capacity 350Ah
Capacity (watts) 4,480W
Parallel Connection  Max. 6 units
Series Connection Max. 4 units
BMS 4S200A
Circuit Protection

Over charge, Over discharge, Over current, Over temp, Short circuit, Balance, Automatic Fault Recovery

Cycle Life

3000 times Cycles @100%DOD and 6000 times @80% DOD

Self Discharge

Less than 3% per Month

Charge Efficiency

100% @0.2C

Discharge Efficiency 

98-100% @1C

Charge Specifications

Charge Voltage


Standard Current


Fast Current


Maximum Outboard Alternator Size

150 Amps

Cut-off Over Voltage


Discharge Specifications

Standard Current  70A
Max. Con. Current 200A
Peak Current 800A (300ms) ~ 1500 CCA
Cut-off Voltage


Temperature Specifications

Charge Temp 0℃ to 55℃ (32℉ to 131℉)
Discharge Temp -20℃ to 60℃(-4℉ to 140℉)
Storage Temp -5℃ to 45℃(23℉ to 113℉)

Certification & Compliance

 UL1642 (cells) File# MH49498
IEC62133 (cells) Standard for Exporting Lithium-ion Batteries
ROHS Electrical and Electronic Equipment
Shipping UN 3480, CLASS 9 Hazmat