Small electronics are super handy, but keeping them powered can be a pain. Finding the right rechargeable battery can save you money and hassle in the long run. Plus, you’re helping the environment a bit by reducing waste. This article will review five of the best 3.7V rechargeable batteries on the market, highlighting their strengths and weaknesses to help you make the best choice.
Product Overview / Quick Summary:
- Keeppower 18650 3500mAh: High capacity, protected, great for high-drain devices.
- Fenix ARB-L16-700U: Compact 16340 with USB charging, ideal for flashlights.
- XTAR 14500 800mAh: AA-sized lithium-ion, good balance of size and power.
- EBL 18650 3000mAh: Reliable, affordable, suitable for various applications.
- Nitecore NL1835HP: High performance, designed for Nitecore devices.
Top 5 Best 3.7 V Rechargeable Battery Reviews
1. Keeppower 18650 3500mAh
The Keeppower 18650 is a high-capacity battery known for its reliability and protected design. It’s designed to deliver consistent power for devices that demand a lot of juice. This battery is a great choice for vapers, flashlights, and other high-drain electronics.
Pros:
- ✅ High capacity (3500mAh) provides long run times.
- ✅ Protected circuit prevents overcharge, over-discharge, and short circuits.
- ✅ Suitable for high-drain devices due to its high discharge rate.
Cons:
- ❌ Slightly longer than unprotected 18650 batteries, which may not fit all devices.
- ❌ Higher price point compared to some other 18650 options.
- ❌ Requires a compatible charger for 18650 batteries.
Verdict: If you need a long-lasting and safe 18650 battery for power-hungry devices, the Keeppower is a solid choice. The added protection circuit provides peace of mind.
2. Fenix ARB-L16-700U
The Fenix ARB-L16-700U is a compact 16340 battery with a built-in micro-USB charging port. This feature makes it incredibly convenient for charging on the go, without needing a dedicated charger. It’s perfect for small flashlights and other portable devices.
Pros:
- ✅ Built-in micro-USB charging port for convenient charging.
- ✅ Compact size (16340) fits small flashlights and devices.
- ✅ Protected circuit ensures safety and longevity.
Cons:
- ❌ Lower capacity (700mAh) compared to larger batteries.
- ❌ Micro-USB charging might be slower than using a dedicated charger.
- ❌ Can be slightly more expensive than standard 16340 batteries.
Verdict: The Fenix ARB-L16-700U is a great option if you value convenience and portability. The built-in USB charging is a game-changer for travel and everyday use.
3. XTAR 14500 800mAh
The XTAR 14500 is a lithium-ion battery in the AA size format. This battery offers a higher voltage and capacity than standard AA alkaline batteries, making it a great upgrade for compatible devices. It’s commonly used in high-performance flashlights and other gadgets that benefit from the increased power.
Pros:
- ✅ AA size for easy replacement in compatible devices.
- ✅ Higher voltage (3.7V) and capacity (800mAh) compared to standard AA batteries.
- ✅ Good balance of size and power.
Cons:
- ❌ Requires a lithium-ion battery charger.
- ❌ Not compatible with all devices that use AA batteries due to the higher voltage.
- ❌ Capacity is lower compared to larger lithium-ion batteries.
Verdict: If you have devices that can handle the higher voltage, the XTAR 14500 is a worthwhile upgrade from standard AA batteries. It provides more power and longer run times.
4. EBL 18650 3000mAh
The EBL 18650 is a reliable and affordable option for those seeking a versatile rechargeable battery. With a capacity of 3000mAh, it offers a good balance between price and performance. It’s suitable for a wide range of applications, from flashlights to laptops.
Pros:
- ✅ Affordable price point.
- ✅ Decent capacity (3000mAh) for extended use.
- ✅ Reliable performance for various applications.
Cons:
- ❌ May not perform as well as higher-end batteries in high-drain devices.
- ❌ Protection circuit may not be as robust as some premium brands.
- ❌ Requires a compatible 18650 battery charger.
Verdict: The EBL 18650 is a great budget-friendly option for general use. It provides good value for the price and is suitable for many devices.
5. Nitecore NL1835HP
The Nitecore NL1835HP is a high-performance 18650 battery designed to deliver maximum power and efficiency. Optimized for use with Nitecore devices, this battery offers exceptional performance and reliability. It is perfect for those who demand the best from their flashlights and other high-powered gadgets.
Pros:
- ✅ High discharge rate for high-performance devices.
- ✅ Optimized for Nitecore flashlights.
- ✅ Reliable and consistent performance.
Cons:
- ❌ Higher price point compared to other 18650 batteries.
- ❌ May not be necessary for devices that don’t require high performance.
- ❌ Requires a compatible 18650 battery charger.
Verdict: If you own Nitecore flashlights or other high-performance devices, the NL1835HP is an excellent investment. It is designed to deliver the power and reliability you need.
Buying Guide
Choosing the right 3.7V rechargeable battery can be tricky, so here are some things to keep in mind:
- Capacity (mAh): Higher mAh means longer run times. Think about how long you need the battery to last between charges.
- Size: Make sure the battery fits your device. Common sizes are 18650, 16340, and 14500 (AA).
- Protection Circuit: Look for batteries with overcharge, over-discharge, and short-circuit protection for safety.
- Charging Method: Consider batteries with built-in USB charging for convenience, or make sure you have a compatible charger.
- Discharge Rate: If you’re using the battery in a high-drain device (like a powerful flashlight), make sure it can handle the current draw.
- Brand Reputation: Stick with reputable brands to ensure quality and safety.
FAQs
Q: What does 3.7V mean for a battery?
A: 3.7V refers to the nominal voltage of the lithium-ion battery. It’s the average voltage the battery provides during discharge.
Q: Can I use a 3.7V battery in a device that requires 3V?
A: Not usually. Using a higher voltage battery can damage the device. Always check the device’s specifications.
Q: How do I properly store 3.7V rechargeable batteries?
A: Store them in a cool, dry place, away from direct sunlight and extreme temperatures. It’s best to store them partially charged (around 40-60%).
Q: Are all 3.7V batteries the same size?
A: No, 3.7V batteries come in various sizes, such as 18650, 16340, and 14500. Make sure you choose the correct size for your device.
Q: How long do 3.7V rechargeable batteries last?
A: It depends on the battery’s capacity, discharge rate, and usage. High-capacity batteries used in low-drain devices will last longer.
Conclusion
Choosing the best 3.7V rechargeable battery depends on your specific needs and devices. Consider the capacity, size, protection features, and charging method to find the perfect fit. The Keeppower 18650 is great for high-drain devices, the Fenix ARB-L16-700U offers convenient USB charging, the XTAR 14500 is a good AA-sized option, the EBL 18650 provides good value, and the Nitecore NL1835HP is ideal for high-performance Nitecore products. By considering these factors, you can keep your devices powered up efficiently and safely.
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