7 Best Portable Batteries for Electric Cars (Researched and Compared)

We researched and compared the best portable batteries for electric cars, evaluating manufacturer specifications, published safety standards, and aggregated owner feedback. Whether you need emergency top-up on a road trip or a reliable backup at home, our guide covers real-world performance, durability, and value. We also highlight limitations and who should skip each product.

1. Jackery Explorer 1000: Best Overall

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The Jackery Explorer 1000 is a top contender for EV owners seeking a portable backup. Its LiFePO4 battery provides excellent cycle life and safety, and the 1000W inverter can deliver Level 1 charging for most EVs. Based on owner feedback, it reliably adds 3-5 miles per hour, making it ideal for emergency top-ups or extending range to the nearest charger. The unit includes multiple USB and AC ports, adding versatility for camping or home use.

However, the Explorer 1000 is heavy at 22 lbs and its charging speed is limited. It is not suitable for fully charging an EV from empty. Skip this if you need rapid charging or have a large battery EV requiring more than a few miles of range. Also, it lacks a built-in MPPT solar controller (sold separately).

• LiFePO4 chemistry offers longer cycle life and better thermal stability than standard lithium-ion.
• 1000W pure sine wave inverter can charge most EVs at Level 1 (120V) speeds, adding about 3-5 miles per hour.
• Weighs 22 lbs, compact enough for trunk storage; includes carrying handle.

Pros: Reliable, safe LiFePO4 battery with 10-year lifespan.; Multiple output ports for charging devices simultaneously.
Cons: Not fast enough for full battery replenishment; only top-up use.

2. Anker PowerHouse 757: Best for Fast Charging

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The Anker PowerHouse 757 stands out with its 1200W inverter, which provides a bit more EV charging speed than the 1000W class. In our evaluation, it adds about 4-6 miles per hour, useful for quick top-ups. The LiFePO4 battery ensures longevity, and the multiple USB-C ports with Power Delivery make it a great companion for electronics. Owner reviews highlight its solid construction and clear display.

However, the 757 is expensive for its capacity, and the charging speed still falls short of Level 2. It is not a solution for full charges. Skip this if you need a budget-friendly option or require more than 1.2 kWh of portable energy. Also, it is relatively heavy at 30 lbs.

• High 1200W inverter output can charge EVs slightly faster than 1000W units, adding 4-6 miles per hour.
• Four USB-C ports (two with 100W PD) for fast charging laptops and devices.
• Smart display shows remaining charge time and output wattage.

Pros: Higher wattage means faster EV top-up.; Excellent build quality and user-friendly interface.
Cons: Premium pricing relative to capacity.

3. BLUETTI EB70S: Best Portable Value

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The BLUETTI EB70S offers a strong balance of portability, capacity, and price. Its 716Wh LiFePO4 battery is enough for a few miles of emergency range, and the 800W inverter handles Level 1 charging adequately. Owner feedback praises its quiet fan and efficient solar input. The unit is one of the lighter options in its class, making it suitable for road trips.

However, the EB70S cannot fully charge a depleted EV and its charging speed is modest. Skip this if you have a long daily commute or need more than 10 miles of backup range. Also, the AC outlets are closely spaced, which may block bulky plugs.

• Compact and lightweight at 21 lbs, easy to carry and store.
• 800W inverter can still charge an EV at Level 1, adding 2-4 miles per hour.
• Supports solar charging up to 200W with included MPPT controller.

Pros: Great value for the capacity and features.; Quiet operation and low standby power consumption.
Cons: Lower capacity may not provide enough range for larger EV batteries.

4. Goal Zero Yeti 1500X: High Capacity Pick

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The Goal Zero Yeti 1500X is a powerhouse for those needing substantial emergency range. Its 1516Wh capacity can provide up to 10 miles of Level 1 charging, and the 2000W inverter can even run some Level 2 chargers at reduced speed. Based on owner reviews, it is reliable and well-built. The ability to expand capacity with extra batteries is a plus for serious off-grid use.

However, the Yeti 1500X is extremely heavy (47 lbs) and expensive. It is not suitable for quick trips or if you have limited trunk space. Also, its lithium-ion battery (not LiFePO4) may have a shorter cycle life. Skip this if portability is key or if you need a more affordable option.

• Large 1516 Wh capacity can add 6-10 miles of range to a typical EV.
• 2000W inverter can power high-draw devices and even some Level 2 chargers (limited).
• Expandable with additional battery modules.

Pros: High capacity for extended backup.; Strong inverter can handle heavy loads.
Cons: Very heavy at 47 lbs, not truly portable for daily carry.

5. EcoFlow River 2 Pro: Best for Road Trips

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The EcoFlow River 2 Pro is designed for travelers who need quick recharging of their portable battery itself. Its 768Wh LiFePO4 battery can be fully charged in just one hour, making it convenient for on-the-go use. The 800W inverter provides Level 1 EV charging at about 2-4 miles per hour. Owner feedback highlights the intuitive app and lightweight design.

However, the River 2 Pro’s capacity is modest, and it won’t add much range to an EV. It is best for small top-ups or charging devices. Skip this if you need significant emergency range or have a large EV battery. Also, the fan can be audible during charging.

• Fast recharging: 0-100% in 1 hour via AC wall outlet.
• Compact and lightweight at 17 lbs, easy to pack in a car.
• App control and monitoring via Bluetooth and Wi-Fi.

Pros: Extremely fast self-charging time.; Smart app integration for remote management.
Cons: Limited capacity may only provide 2-4 miles of EV range.

6. NOCO Boost Plus GB40: Best Compact Jump Starter

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The NOCO Boost Plus GB40 is a compact jump starter designed for 12V batteries, which in EVs power the lights, infotainment, and door locks. It is not a portable charger for the main traction battery. However, if your EV’s 12V battery dies (a common issue), this device can get you back on the road. Owner reviews praise its reliability and safety features.

But do not expect this to add any driving range. It is strictly for auxiliary battery emergencies. Skip this if you need to charge your EV’s main battery. Also, its capacity is too small for extended device charging.

• Ultra-compact, fits in glove box; weighs only 2.5 lbs.
• Can jump-start a dead 12V battery in an EV (for auxiliary systems) but does not charge the main traction battery.
• Includes USB port for charging phones and tablets.

Pros: Extremely portable and affordable.; Safe spark-proof technology and reverse polarity protection.
Cons: Cannot add range to the EV's main battery; only assists 12V system.

7. HUSKY Portable Power Station 300: Budget Pick

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The HUSKY Portable Power Station 300 is a budget-friendly option for powering small electronics, but it is not designed for EV charging. Its 300W inverter can technically trickle-charge an EV at less than 1 mile per hour, which is impractical. Owner feedback indicates it works well for camping and device charging but not for EVs.

Skip this if you need any meaningful EV range addition. It is best for those who want a cheap backup for phones and lights. Also, the battery chemistry is standard lithium-ion with a shorter lifespan.

• Very affordable entry-level portable power station.
• Lightweight at 7.5 lbs, easy to carry.
• Can charge phones, laptops, and small devices; limited EV use.

Pros: Low price point for basic backup power.; Compact and simple to operate.
Cons: 300W inverter insufficient for most EV charging (only ultra-slow trickle).

Frequently Asked Questions

Can a portable battery fully charge an electric car?

No, most portable batteries (power stations) are designed for emergency top-ups, not full charges. They typically add 2-10 miles of range per hour, depending on capacity and inverter wattage. Fully charging a modern EV would require a much larger stationary battery or a Level 2 charger.

What size portable battery do I need for my EV?

Consider your EV’s battery size and your typical range needs. A 500-1000Wh unit can add 3-5 miles, useful for reaching the nearest charger. For longer backup, 1500Wh+ units provide 6-10 miles. If you only need to jump-start the 12V battery, a compact jump starter like the NOCO GB40 suffices.

Are portable batteries safe to use in the car?

Yes, when used according to manufacturer guidelines. Look for units with LiFePO4 chemistry (safer, longer life) and built-in protections like overcharge, overcurrent, and short circuit prevention. Avoid leaving them in direct sunlight or extreme temperatures.

How long does it take to recharge a portable battery?

Recharge times vary. Most units take 2-8 hours via AC wall outlet. Some models like the EcoFlow River 2 Pro can recharge in 1 hour. Solar charging is slower and depends on panel wattage and sunlight.

Can I use a portable battery while driving?

Yes, many portable batteries can be used while the car is moving, as long as they are securely placed. However, charging the portable battery from the car’s 12V outlet while driving is possible but slow. Always follow the manufacturer’s safety instructions.

Our Verdict

After researching specifications, safety standards, and owner feedback, the Jackery Explorer 1000 earns our top pick for its reliable LiFePO4 battery, versatile ports, and balanced performance for emergency EV top-ups. The Anker PowerHouse 757 is a strong runner-up for those wanting faster charging and higher build quality.

Last reviewed and spec-checked: July 25, 2024. We re-check our picks and listings periodically.