[Ultra Compact] Poweradd Compact Car Jump Starter and Portable Charger Power Bank with 400A Peak Current, Advanced Safety Protection Safest Protection - Proprietary DP3-MOS safety system provides up to 11 kinds of protection to ensure worry-free use Unique Low Temperature Start Function - The Carmate3 can start your car engine easily even at -4 (-20), please recharge it with 5V/2A adapter. Compact but Powerful - Compact size (ONLY 5.2*2.7*0.6 inches) makes it portable and easy to storage. With a peak current output of 400A, jump starting your 3.5L (or lower) gas engine is never a difficulty. Heat-Resistant Ability - According to hundreds of test in lab, after storing in high temperature environment of 176 (80) for up to 8 hours, the Carmate3 still functions perfectly Industry-Leading Warranty: 24 months limited product warranty and 24*7 easy-to-reach customer service