SKU: 47726374416

BLUETTI B300K2 Expansion Battery | 2764.8Wh | Battery For Apex 300

Sale price$427.05 Regular price$474.50
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Description

BLUETTI B300K2 Expansion Battery | 2764.8Wh | Battery For Apex 300The BLUETTI B300K2 Expansion Battery is designed to extend the energy capacity of compatible BLUETTI power stations, including the AC300, AC500, and APEX 300 models. It provides an additional 2,764. 8Wh of storage, supporting a wide range of energy needs from daily use to backup power during outages. With its integrated USB A output, the unit can also function independently to charge small devices such as smartphones, tablets, and other USB powered

The BLUETTI B300K2 Expansion Battery is designed to extend the energy capacity of compatible BLUETTI power stations, including the AC300, AC500, and APEX 300 models. It provides an additional 2,764.8Wh of storage, supporting a wide range of energy needs from daily use to backup power during outages.

With its integrated USB-A output, the unit can also function independently to charge small devices such as smartphones, tablets, and other USB-powered equipment. The stackable design allows for flexible system expansion, enabling users to scale their energy setup according to their requirements.

The battery uses LiFePO₄ (Lithium Iron Phosphate) technology, offering long cycle life and stable performance. Its durable construction and built-in battery management system support safe and reliable operation across different environments.

Important compatibility notes:

  • To connect to AC500, P150D to P090D cable and CA90 short cable are required
  • To connect to AC300, P090A long cable and CA90 short cable are required
  • These cables are no longer manufactured and are not available for purchase


Features

  • Provides 2,764.8Wh additional energy capacity for compatible systems
  • Compatible with AC300, AC500, and APEX 300 power stations
  • Integrated USB-A port for direct device charging
  • LiFePO₄ battery chemistry with over 4,000 charge cycles
  • Stackable design for scalable energy storage solutions
  • Built-in battery management system for operational safety
  • Durable aluminum casing for improved reliability
  • Supports expansion up to 33,177.6Wh when used with AC50


Specifications

  • Model: B300K2
  • Battery Capacity: 2,764.8Wh (51.2V, 54Ah)
  • Battery Type: LiFePO₄ (Lithium Iron Phosphate)
  • Cycle Life: 4,000+ cycles (to 80% capacity)
  • USB-A Output: 12W Max., 5V / 2.4A
  • Total Capacity: 2,764.8Wh
  • Weight: 29.5kg (65.04lbs)
  • Dimensions (L×W×H): 52.5 × 32.7 × 20.9 cm (20.67 × 12.87 × 8.23 in)
  • 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 (may reduce outside optimal temperatures)
  • Discharging Current: 70A Max
  • Expansion Ports: 2 × Ports, 58.4VDC Max., 90A Max
  • Compatibility: AC300, AC500, APEX 300


Manuals

User Manual included - Click here to download


Warranty

3-year manufacturer warranty covering defects in materials and workmanship

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: 47726374416

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Amazon Customer
Cuba, US
★★★★★ 4
Accuracy beyond belief!
This watch houses ETA's newest entry level movement [C07.111] Powermatic 80. It is so accurate it shows up as one solid line on my Otto Frei Timegrapher! And its seconds per day readings are 0 and +1 throughout the entire reading. Only two things stop this beauty from getting 5 starts. First, as pretty as it is it is still just average when compared to similarly priced watches. Secondly, the pallet fork and balance is made as a throw away module and basically non repairable. It is made of a plastic material and to date has no history to go by in determining longevity. For the money buy it! For the collector give it a few more years of study...
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Reviewed in the United States on June 30, 2020
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skadoosh
Charlottesville, US
★★★★★ 5
worth it!
beautiful time piece. value for price is definitely evident especially considering how much cheaper it is compared to the blue dial version, granted the blue dial looks stunning but for the difference in price for prettty much the same thing. the choice is clear
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Reviewed in the United States on July 27, 2020
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Gustavo
Louisville, US
★★★★★ 5
Reloj
Excelente reloj
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Reviewed in the United States on August 30, 2023
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Andre S. Palomo
Natrona Heights, US
★★★★★ 5
Great watch!
Style: Dress, Color: Gold Tone Stainless Steel
BEAUTIFUL WATCH and excellent horology you would expect from Citizen.
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Reviewed in the United States on April 10, 2026
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Nicole Palochik
Natrona Heights, US
★★★★★ 5
Great Buy
Style: Dress, Color: Two-Tone Gold/ Blue Dial, Style: Dress, Color: Two-Tone Gold/ Blue Dial
Stunning watch!! Purchased for my boyfriend for his birthday. He is a bigger guy with a larger arm/wrist so the size of this watch looks great on him. He receives a ton of compliments on it, and it still catches my eye every time he wears it. Decent weight without being too heavy (he reports). Perfect to wear as a daily watch or dress up with
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Reviewed in the United States on February 6, 2026

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