SKU: 12508683772

Bluetti B300K Expansion Battery | 2,764.8Wh

Sale price$809.55 Regular price$899.50
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Description

Bluetti B300K Expansion Battery | 2,764.8WhPower That Keeps Up With You B300K Expansion Battery Sick of half baked power setups letting you down? The B300K Expansion Battery smashes that worry out the park with 2,764. 8Wh of serious juice and over 4,000 life cycles built to go the distance. Whether you're off grid, stuck in a blackout, or just want the backup muscle to keep the beers cold and the lights on, this little rippers got your back. Built tough with automotive grade LiFePO cells and

Power That Keeps Up With You – B300K Expansion Battery

Sick of half-baked power setups letting you down?

The B300K Expansion Battery smashes that worry out the park with 2,764.8Wh of serious juice and over 4,000 life cycles built to go the distance.

Whether you're off-grid, stuck in a blackout, or just want the backup muscle to keep the beers cold and the lights on, this little ripper’s got your back.

Built tough with automotive-grade LiFePO₄ cells and smart BMS tech, it charges fast and hooks up easily to plenty of units including the AC200L, AC300, or AC500.


Built to Last and Built for Legends – Bluetti B300K Battery

Ever wished you could stack your power like you stack your beers? Now you can.

The Bluetti B300K Battery doesn't just sit there looking pretty – it’s a real workhorse, with a massive lifespan and smart expansion options to keep your adventures rolling.

You can mix and match it with B300, B300S models, and pile up enough power to last longer than your average camping trip.

Plus, with a solid aluminium shell and advanced AI battery management, it’s engineered to cop a flogging and still come back for more.

Click Add to Cart now and make dead batteries one less thing you’ll have to think about.

Add To Cart



Key Features

  • Massive 2,764.8Wh capacity for serious power needs
  • 4,000+ cycles for years of weekend getaways
  • Automotive-grade LiFePO₄ battery for rugged reliability
  • Fast charges up to 80% in 45 minutes with AC500
  • Standalone USB-A port to top up essentials
  • Expandable – link up to 16,588Wh with AC500
  • Safe as houses with smart AI-BMS tech and tough build
  • Comes with expansion cable and manual – ready to go

Bluetti B300K Specs

BATTERY INFO

  • Capacity: 2,764.8Wh (51.2V, 54Ah)
  • Type: LiFePO₄ (Lithium Iron Phosphate)
  • Life Cycles: 4,000+ Cycles to 80% Original Capacity

OUTPUT

  • USB-A Port: 12W Max., 5V / 2.4A


GENERAL

  • Weight: Approx. 29.5kg (65.04lbs)
  • Dimensions (L x W x D): 525 × 327 × 209mm (20.67 × 12.87 × 8.23in)
  • Charging Temperature: 0°C to 40°C (32°F to 104°F)
  • Discharging Temperature: -20°C to 40°C (-4°F to 104°F)
  • Storage Temperature:
  • – Up to 1 month: -20°C to 40°C (-4°F to 104°F)
  • – Up to 6 months: -20°C to 25°C (-4°F to 77°F)
  • Working Humidity: 5% to 95%RH
  • Charging Current: 60A Max. (Current may decrease outside specified temperatures)
  • Discharging Current: 70A Max.
  • Expansion Ports: 2 × 58.4VDC Max., 90A Max.
  • Warranty: 4 Years

What's Included

Everything you need is included with your purchase from True Gear

  • Bluetti B300K Expansion Battery
  • Short Battery Expansion Cable (For APEX 300 - CA90)
  • User Manual
  • Warranty Card
  • 4-Year Manufacturer Warranty

Download the Bluetti B300K manual

Looking for detailed information on the Bluetti B300K? Then check out the complete manual below.

Read Bluetti B300K reviews down below ↓


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 12508683772

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4.7 ★★★★★
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Product Reviews
S
Verified Purchase
Shlomo Phillips
Chelsea, US
★★★★★ 5
Won't go through "hurricane" or chain-link fencing - dogs LOVE it.
Color: Orange, Size: Large
We've been using this size (large) for about 2 years now. Between our Doberman pinscher and the boxer-pitbull mix, they are tough on toys. These dogs have access to the Chuckit Ultra balls only under supervision and they run like crazy in the backyard while either fetching or holding onto the balls. It keeps our doberman out of trouble because she's running with a ball in her mouth and therefor cannot nip at the other dog when she gets overly excited. Tennis balls are lucky to last one play session with these guys, just for comparison purposes. When throwing the regular size, the ball occasionally went right through our backyard (chain link aka "hurricane") fence -- even though they shouldn't quite fit. The size large balls bounce off the fence; our only problem now is when one of the dogs does a soccer style head-butt and knocks the ball over the fence that way. After 2 years, one ball has a split down the side and two are discolored because they were left outside when we couldn't locate them after a play session. Overall I like these very much and appreciate how well they've held up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 22, 2021
S
Verified Purchase
StuartS
Lexington, US
★★★★★ 5
My dog and I love this!
Color: Orange, Size: Large
The balls are larger and fit the Chuck It with the larger ball size perfectly. The balls are hard rubber material and have stood up to continued chewing after our dog picks them up. They bounce and are really hard wearing. Great product for the price!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2025
C
Verified Purchase
Cedarlamb
Grantham, US
★★★★★ 4
Durable but don't give this to them as an everyday chew toy.
Color: Orange, Size: Large
My Catahoula loves these things. Great for a training aid and to let them get their zoomies out but not durable enough for an idle chew toy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 10, 2023
J
Verified Purchase
JewelsfromJerri
Chelsea, US
★★★★★ 5
Fun, Durable Balls for smaller heavy chewers
Color: Four colors, Size: 5cm (ball only)
Perfect size and strength for my small dog that is a heavy chewer! She hasn’t been able to destroy and chew up this one like she has with every other toy! Definitely chew resistant.
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Reviewed in the United States on April 26, 2026
J
Verified Purchase
Jen Johnson
Fort Morgan, US
★★★★★ 5
Bouncy and durable
Color: Four colors, Size: 5cm (ball only), Color: Four colors, Size: 5cm (ball only)
These balls are awesome - bouncy and super durable for my little guy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026

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