EcoFlow RIVER 3 Plus Extra Battery 300Wh

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} .martin-modal-btn { display: flex; align-items: center; justify-content: center; gap: 12px; width: 100%; padding: 14px; margin: 12px 0; border-radius: 8px; font-weight: bold; text-decoration: none; font-size: 18px; transition: 0.2s; cursor: pointer; font-family: inherit; box-sizing: border-box; } .btn-call { background: #00a04c; color: #fff !important; border: 2px solid #00a04c; } .btn-chat { background: #fff; color: #00a04c !important; border: 2px solid #00a04c; } .btn-text { background: #fff; color: #00a04c !important; border: 2px solid #00a04c; } .martin-modal-btn:hover { opacity: 0.9; transform: scale(1.01); } @media (max-width: 798px) { .ecoflow-feature-row { flex-direction: column; } .ecoflow-feature-row.media-left .ecoflow-feature-media, .ecoflow-feature-row.media-right .ecoflow-feature-media { order: -1; } .ecoflow-variant-specs { flex-direction: column; } } More Power for Your RIVER 3 Plus, Whenever You Need It The EcoFlow RIVER 3 Plus Smart Extra Battery expands your RIVER 3 Plus up to 858Wh, giving you more runtime for longer outages or bigger trips. It's one of the accessories we carry for our EcoFlow Generators lineup, and it's available in two sizes, the EB300 (286Wh) and the EB600 (572Wh), so you can pick the capacity that fits your needs. Why You Need the RIVER 3 Plus Smart Extra Battery A single RIVER 3 Plus can only carry so much charge on its own. Stack the EB300 or EB600 on top of it, one at a time, to reach up to 858Wh of total capacity, so you can keep essential devices running longer without needing a bigger power station. It also adds a second USB-C charging option and can be used completely on its own when you want to travel light. EcoFlow RIVER 3 Plus Smart Extra Battery Features Expandable Up to 858Wh Choose either the EB300 (286Wh) or the EB600 (572Wh), and simply stack one at a time on your RIVER 3 Plus to reach up to 858Wh of total capacity as your energy needs grow. An Extra Charging and Recharging Option The Extra Battery adds a 140W USB-C port to your setup, giving you a convenient way to charge more devices or recharge your RIVER 3 Plus itself. Since it works independently, you get the freedom to use just the Extra Battery on its own when you don't need the full system. Hassle-Free Pogo Pin Connection Using Pogo Pin technology, the Extra Battery connects to your RIVER 3 Plus wirelessly, fastening in place with simple clips instead of cables or screws. It's plug-and-play within seconds. Lightweight Enough to Use on Its Own At just 7.7 lb, the EB300 is lighter than the RIVER 3 Plus itself, with a compact design and its own USB-C input and output. That makes it a convenient, standalone option for short outdoor trips where you only need to power a few devices. 10-Year Lifespan with LFP Battery Tech The Extra Battery uses the same LFP battery technology as the RIVER 3 Plus and is backed by a 5-year warranty, giving you worry-free, long-lasting performance for up to 10 years from a single investment. EcoFlow RIVER 3 Plus Smart Extra Battery Specs Extra Battery 300 (EB300) Capacity: 286Wh Dimensions: 9.2 x 8.8 x 4.3 in Net Weight: 7.7 lb Battery Chemistry: LiFePO4, 3000 cycles to 80% capacity USB-C Output: 1 port, 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max USB-C Input: 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max Extra Battery 600 (EB600) Capacity: 572Wh Dimensions: 9.2 x 8.8 x 6.2 in Net Weight: 12.8 lb Battery Chemistry: LiFePO4, 3000 cycles to 80% capacity USB-C Output: 1 port, 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max USB-C Input: 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max Questions About the RIVER 3 Plus Smart Extra Battery? Chat, Call, or Text us We can help you pick the right size for your setup! Call for the best deal. 1-844-945-3625 Frequently Asked Questions What's the difference between the EB300 and EB600? The EB300 adds 286Wh of capacity and weighs 7.7 lb, while the EB600 adds 572Wh and weighs 12.8 lb. Both share the same battery chemistry, USB-C input and output, and dimensions aside from height. Stacking both together on a RIVER 3 Plus gets you up to 858Wh total. How does the Extra Battery connect to the RIVER 3 Plus? It uses Pogo Pin technology to connect wirelessly, fastening in place with clips instead of cables or screws, so it's plug-and-play within seconds. Can I use the Extra Battery without the RIVER 3 Plus? Yes. It works independently, with its own USB-C input and output, so you can charge devices directly from the Extra Battery when you want to travel light. How long will it last? It uses the same LFP battery technology as the RIVER 3 Plus, rated for 3000 cycles to 80% capacity, and is backed by a 5-year warranty for up to 10 years of use. Can I stack more than one Extra Battery? Yes. You can stack one Extra Battery at a time on your RIVER 3 Plus, and combining an EB300 and EB600 gets you up to 858Wh of total capacity. × Connect With Us We'll help you pick the right size and find the best deal! 1-844-945-3625 📞 Call Now 💬 Chat with Us ✉️ Text Us Mon-Fri: 10am-5pm CSTAfter hours? Chat with Oaky, our 24-hour AI concierge! Show more