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If your device is well designed, it will work normally as your alkaline or NiMH battery gradually decreases in voltage. The Tenavolts are for those devices that are very fussy about the voltage. The batteries are expensive, but they perform exactly as advertised, and deliver an extremely constant 1.5 volts. And they can handle high current spikes easily. I use them in motorized Nerf blasters which are famous for eating batteries.
One last thing, "Nanfu Direct". I'd never heard of the company, so I didn't know what to expect. Well, one of the 12 Tenavolts batteries I got proved defective. It took a few weeks to find this out. I emailed Nanfu through Amazon's link, explained what happened, and asked if they could replace the bad one. I got the "thank you, please allow 1-2 days for a response" message.
Instead of 1-2 days, they responded within hours, apologized for the problem and immediately sent a replacement. I'm impressed.
update, October 13, 2020. One reviewer felt that the battery capacity was much less than advertised. However, my batteries all test near the advertised number. The printing on the battery says "2775 mWh". My measurements of 4 batteries averaged 2300 mWh, which I think is pretty close.
Some confusion may be the difference between "mah" and "mWh" (milliamp-hours vs. milliwatt-hours; milliamps and milliwatts are different). Most batteries quote capacity in mah. If the Tenavolts people had used mah, they would have printed "1850 mah" on the label (2775 divided by the voltage, 1.5). By this measure, the batteries I tested averaged 1556 mah. Not quite 1850, but not way off either.
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Make it a bundle
We found 1 bundle with this item:
TENAVOLTS 1.5V AA Lithium Rechargeable Battery, 1.8h Fast Charge, USB Charger, Constant Output at 1.5V, 2775 mWh, 4 Count with Charger
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TENAVOLTS 1.5V AA Lithium Rechargeable Battery + NANFU High Performance AAA Alkaline Batteries (20 Count)38.38This bundle contains 2 items
Product Description
Benefits
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Integrated 3-in-1 Safety ChipProtects the lithium core from over-charge, over-discharge, over-temperature, and short circuit. |
Fast ChargingGet fully charged in 1.8 hours. Offer you 12-14 hours of fantastic gaming time. |
Higher Capacity3A max constant output current makes it perfect for the high-power devices. |
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Recycleable and Environmental ProtectionCapable of 1000 charge cycles to share countless thrilling moments with years of companion. |
Working TemperatureAlways reliable and useable with temperatures ranging from 0 to 40℃. |
Ready to ServeEach is pre-charged, but charge before use is suggested for better performance. |
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| AA 4 Pack with Charger | AA 4 Pack without Charger | AA 20 Pack with Charger | AAA 4 Pack with Charger | AAA 4 Pack without Charger | AA 2 Pack with Charger | |
| Composition | Lithium Ion | Lithium Ion | Lithium Ion | Lithium Ion | Lithium Ion | Lithium Ion |
| Packing List | 4 x Lithium Rechargeable Battery 1 x Four-slot USB Charger 1 x Charging Cable | 4 x Lithium Rechargeable Battery 1 x Storage Case | 20 x Lithium Rechargeable Battery 1 x Twenty-slot AC Power Charger 1 x Charging Adapter 1 x Storage Case | 4 x Lithium Rechargeable Battery 1 x Four-slot USB Charger 1 x Charging Cable | 4 x Lithium Rechargeable Battery 1 x Storage Case | 2 x Lithium Rechargeable Battery 1 x Two-slot USB Charger 1 x Charging Cable |
| Rechargeable | Yes | Yes | Yes | Yes | Yes | Yes |
| Voltage | Consistent 1.5V | Consistent 1.5V | Consistent 1.5V | Consistent 1.5V | Consistent 1.5V | Consistent 1.5V |
| Charge Cycles | 1000 Cycles | 1000 Cycles | 1000 Cycles | 1000 Cycles | 1000 Cycles | 1000 Cycles |
| Charge Time | 1 hour 48 minutes | 1 hour 48 minutes | 1 hour 48 minutes | 1 hour 48 minutes | 1 hour 48 minutes | 1 hour 48 minutes |
| Capacity | 2775mWh | 2775mWh | 2775mWh | 1110mWh | 1110mWh | 2775mWh |
| Ideally Suited For | Xbox Game Controller RC Car Camera Flash Flashlight Blink Camera | Xbox Game Controller RC Car Camera Flash Flashlight Blink Camera | Wireless Microphone Camera Flash Blink Camera Home Improvement | Toy Flashlight Camera Flash Head Lamp Wireless Headset | Toy Flashlight Camera Flash Head Lamp Wireless Headset | Xbox Game Controller RC Car Camera Flash Flashlight Blink Camera |
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Customer Questions & Answers
Customer reviews
Top reviews from the United States
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Reviewed in the United States on December 31, 2019
One last thing, "Nanfu Direct". I'd never heard of the company, so I didn't know what to expect. Well, one of the 12 Tenavolts batteries I got proved defective. It took a few weeks to find this out. I emailed Nanfu through Amazon's link, explained what happened, and asked if they could replace the bad one. I got the "thank you, please allow 1-2 days for a response" message.
Instead of 1-2 days, they responded within hours, apologized for the problem and immediately sent a replacement. I'm impressed.
update, October 13, 2020. One reviewer felt that the battery capacity was much less than advertised. However, my batteries all test near the advertised number. The printing on the battery says "2775 mWh". My measurements of 4 batteries averaged 2300 mWh, which I think is pretty close.
Some confusion may be the difference between "mah" and "mWh" (milliamp-hours vs. milliwatt-hours; milliamps and milliwatts are different). Most batteries quote capacity in mah. If the Tenavolts people had used mah, they would have printed "1850 mah" on the label (2775 divided by the voltage, 1.5). By this measure, the batteries I tested averaged 1556 mah. Not quite 1850, but not way off either.
Size: AA 4 Count with ChargerVerified Purchase
An AA sized regulated 1.5 volt power supply.
By Vance Purdy on December 31, 2019
If your device is well designed, it will work normally as your alkaline or NiMH battery gradually decreases in voltage. The Tenavolts are for those devices that are very fussy about the voltage. The batteries are expensive, but they perform exactly as advertised, and deliver an extremely constant 1.5 volts. And they can handle high current spikes easily. I use them in motorized Nerf blasters which are famous for eating batteries.By Vance Purdy on December 31, 2019
One last thing, "Nanfu Direct". I'd never heard of the company, so I didn't know what to expect. Well, one of the 12 Tenavolts batteries I got proved defective. It took a few weeks to find this out. I emailed Nanfu through Amazon's link, explained what happened, and asked if they could replace the bad one. I got the "thank you, please allow 1-2 days for a response" message.
Instead of 1-2 days, they responded within hours, apologized for the problem and immediately sent a replacement. I'm impressed.
update, October 13, 2020. One reviewer felt that the battery capacity was much less than advertised. However, my batteries all test near the advertised number. The printing on the battery says "2775 mWh". My measurements of 4 batteries averaged 2300 mWh, which I think is pretty close.
Some confusion may be the difference between "mah" and "mWh" (milliamp-hours vs. milliwatt-hours; milliamps and milliwatts are different). Most batteries quote capacity in mah. If the Tenavolts people had used mah, they would have printed "1850 mah" on the label (2775 divided by the voltage, 1.5). By this measure, the batteries I tested averaged 1556 mah. Not quite 1850, but not way off either.
Images in this review
Reviewed in the United States on February 1, 2020
Size: AA 4 Count with ChargerVerified Purchase
Reviewed in the United States on January 7, 2020
Size: AA 4 Count with ChargerVerified Purchase
Reviewed in the United States on March 30, 2019
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Reviewed in the United States on June 28, 2020
Size: AA 4 Count with ChargerVerified Purchase
Reviewed in the United States on October 29, 2019
Size: AA 4 Count with ChargerVerified Purchase
Top reviews from other countries
John
Extremely long life over Energizer non-rechargeable
Reviewed in the United Kingdom on January 14, 2021Size: AA 4 Count with ChargerVerified Purchase
Amazon Customer
Great for blink
Reviewed in the United Kingdom on March 7, 2021Size: AA 4 Count with ChargerVerified Purchase
Amazon1
Best batteries. Please add more choice to Amazon
Reviewed in the United Kingdom on April 15, 2021Size: AA 4 Count with ChargerVerified Purchase
Graham W.
Perfectly fine
Reviewed in the United Kingdom on April 13, 2021Size: AA 4 Count with ChargerVerified Purchase
ian staff
Best on the market
Reviewed in the United Kingdom on March 25, 2021Size: AA 4 Count with ChargerVerified Purchase
