EcoFlow Extra Battery Expansion Adapter for DELTA 3 MAX | Ultra Plus

===== ECOFLOW EXTRA BATTERY EXPANSION ADAPTER PRODUCT PAGE CSS ===== /.hb21-spec-wrap max-width: 1100px; margin: 0 auto 40px auto; padding: 0 20px; text-align: center;.hb21-spec-wrap h2,.hb21-spec-wrap h3,.hb21-spec-wrap p,.hb21-spec-wrap li text-align: center;.hb21-product-intro max-width: 920px; margin: 0 auto 30px auto;.hb21-product-intro h2 margin: 0 0 14px 0; font-size: 2rem; line-height: 1.2;.hb21-product-intro p margin: 0 auto 14px auto; line-height: 1.7; max-width: 900px;.hb21-spec-grid display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 30px; text-align: left;.hb21-spec-card background: #f7f7f7; border-radius: 14px; padding: 24px; text-align: left;.hb21-spec-card h3 margin: 0 0 16px 0; font-size: 1.25rem; text-align: left;.hb21-spec-card ul list-style: none; padding: 0; margin: 0;.hb21-spec-card li margin: 0 0 10px 0; line-height: 1.55; text-align: left;.hb21-spec-card strong font-weight: 700;.hb21-spec-card a color: #0066cc; text-decoration: underline;.hb21-warranty-note margin-top: 20px; font-size: 1rem; line-height: 1.6; text-align: left;.hb21-section max-width: 1100px; margin: 0 auto; padding: 34px 20px; text-align: center;.hb21-section h2,.hb21-section h3 font-size: 2rem; line-height: 1.2; font-weight: 700; margin: 0 0 14px 0; text-align: center;.hb21-section p max-width: 900px; margin: 0 auto 14px auto; line-height: 1.65; text-align: center;.hb21-section a,.hb21-faq-item a color: #0066cc; text-decoration: underline;.hb21-image-full max-width: 1100px; margin: 0 auto; padding: 14px 20px;.hb21-image-full img display: block; width: 100%; height: auto; margin: 0 auto; border-radius: 8px;.hb21-faq-wrap max-width: 980px; margin: 40px auto 20px auto; padding: 0 20px; text-align: center;.hb21-faq-wrap h2 font-size: 2rem; line-height: 1.2; margin-bottom: 20px; text-align: center;.hb21-faq-item background: #f7f7f7; border-radius: 12px; padding: 18px 20px; margin-bottom: 14px; text-align: left;.hb21-faq-item h3 margin: 0 0 8px 0; font-size: 1.1rem; line-height: 1.4; text-align: left;.hb21-faq-item p margin: 0; line-height: 1.65; text-align: left; @media (max-width: 989px).hb21-spec-grid grid-template-columns: 1fr;.hb21-product-intro h2,.hb21-section h2,.hb21-section h3,.hb21-faq-wrap h2 font-size: 1.7rem; Overview

The EcoFlow Extra Battery Expansion Adapter is the cable you need to connect a second Smart Extra Battery to the EcoFlow DELTA 3 Max Plus or EcoFlow DELTA 3 Ultra Plus. These power stations only have one extra battery output port, so this adapter splits the connection and lets you stack two compatible Smart Extra Batteries through a single cable to unlock the full expandable capacity (up to 10kWh on DELTA 3 Max Plus, up to 12kWh on DELTA 3 Ultra Plus).

You don't need this adapter for your first extra battery, only when you want to add a second. Compatible Smart Extra Batteries are the EcoFlow DELTA 3 Max Plus Smart Extra Battery (2048Wh) and the EcoFlow DELTA Pro 3 Smart Extra Battery (4096Wh). For best results, we recommend using two of the same battery type on the adapter. Key Features:

- Function: Connects two Smart Extra Batteries to a single Extra Battery Port on the host power station
- Compatible Power Stations: DELTA 3 Max Plus, DELTA 3 Ultra Plus
- Compatible Extra Batteries: EcoFlow DELTA 3 Max Plus Smart Extra Battery (2048Wh), EcoFlow DELTA Pro 3 Smart Extra Battery (4096Wh)
- Connection: Single cable to the power station, splits into two outputs for the extra batteries
- Power Required Per Side: No external power needed, draws through the host power station What's in the Box?

- 1 x EcoFlow Extra Battery Expansion Adapter cable
- 1 x User Documentation
- Warranty: 1-year warranty

Note: Extra batteries and host power stations are not included. This is a cable/adapter accessory only. You need the host power station and two compatible Smart Extra Batteries (sold separately) to use this adapter. Why You Need This Adapter

The DELTA 3 Max Plus and DELTA 3 Ultra Plus each have one Extra Battery Port on the back. With the standard battery cable that ships with each Smart Extra Battery, you can only connect one extra battery at a time. To unlock the full expandable capacity rating for each power station, you need to connect two extra batteries, and this adapter is the only EcoFlow-approved way to do it.

Plug the single-end side of the adapter into the host power station's Extra Battery Port, then plug each of the two split ends into a compatible Smart Extra Battery. The power station automatically detects and balances both batteries through one connection. Maximum Expandable Capacity Unlocked

The DELTA 3 Max Plus has a standalone capacity of 2048Wh. Add two Smart Extra Batteries via this adapter and the total system c