BLUETTI B300K Expansion Battery

Name: BLUETTI B300K Expansion Battery
Brand: BLUETTI

Ranked #5 of 9 in Best Expansion Batteries for Power Stations: EcoFlow, Jackery, Anker, BLUETTI (2026). Here is every spec we scored, where it came from, and how it compares.

Affiliate disclosure: We earn a commission if you buy through links on this page, at no extra cost to you. It never affects our rankings, which come from the published scoring formula. As an Amazon Associate I earn from qualifying purchases. Learn more.

BLUETTI B300K Expansion Battery

Best for: The widest compatibility and a 6,000-cycle rating

4.8/10

What we like

Fits five BLUETTI stations
6,000+ cycles to 80%

Watch out for

Lowest Wh/kg here

Score breakdown

Capacity 45%

Energy per kg 35%

Cycle rating 20%

Capacity	2764.8 Wh
Energy per kg	93.7 Wh/kg
Cycle rating	6000 cycles
Capacity	2,764.8 Wh
Chemistry	LiFePO4
Cycle rating	6,000+ to 80%
Fits	AC200L, AC200MAX, AC300, AC500 (P090D-to-P150D cable sold separately), Apex 300
USB-A	12 W
Weight	29.5 kg (65.04 lb)
Warranty	3 + 1 years
Price	Check price