Funkawa Shockli AA Size Lithium Iron Phosphate 650mAh Rechargeable Battery

By: funkawa

funkawa Shockli AA Size LiFePo4 650mAh Battery is the 9Reviews top pick, as determined by analyzing over 200,000 reviews on December 30, 2022 at 12:33 PM. This battery is sure to provide reliable and long-lasting power for your devices.
79
B2B Rating
49 reviews

Review rating details

Value for money
95
Packaging
93
Overall performance
95
Build quality
95
Battery efficiency
95

Details of Funkawa Shockli AA Size Lithium Iron Phosphate 650mAh Rechargeable Battery

  • Voltage: 3.2 Volts
  • Unit Count: 4.0 Count
  • Number of Batteries: 4 AA batteries required.
  • Batteries: 4 AA batteries required.
  • Manufacturer: shockli
  • Date First Available: May 7, 2019
  • Item Weight: 2.39 ounces
  • Battery Cell Composition: Lithium-Phosphate
  • Brand: funkawa
  • Customer Reviews: 4.3/5 stars of 759 ratings
  • Best Sellers Rank: #85,372 in Health & Household #306 in AA Batteries
  • Package Dimensions: 2.32 x 2.09 x 0.67 inches
  • ASIN: B07RGQX6W7

Comments

aprwx: I'm completely re-writing my review. I had previously given a 1 star review saying that the capacity wasn't a fraction of what they claimed.

After some thought, I realized that they perhaps didn't ship the batteries with a full charge. I believe this is the case, and then putting them in solar lights 'dead' in a Minnesota winter gave it no chance to charge up the batteries to capacity.

To test this theory, I bought a special charger that does 3.2v batteries. It also allows you to test the capacity. As expected, the batteries were dead, but after charging and running a test -- showed that they had 608 mAh capacity (one battery test), which I think is acceptable (they are never right on with the specs, and still far better than the 300 mAh batteries that came with my solar lights).

I put them in the solar lights and they were bright all night long. Any issues I have beyond this point is going to be on the solar lights, and not the battery since their capacities are good and holding a charge.

So the only recommendation I have for people is to get a 3.2v charger and charge them up when you get them, as they may be shipped dead. [this is typical of some...

United States on Nov 30, 2023

Joe: Just replaced 2 string lights this week with these batteries. Light are as bright as the day I put them up. These batteries may outlast the solar panel.

United States on Oct 30, 2023

GaryD: I purchased the Shockli 4 pack in July, but first needed them in October. I charged two batteries separately, using an IMAX B6 Mini charger in the LiFePO4 mode. They needed only about 60 mah to bring them to full charge. I then used the batteries in series to power an ESP32 module. When the power was depleted below operating level, I measured the voltage as just above 2.5V on each cell. I charged each battery using a 0.2 Amp charge which should be roughly a 0.3C rate, This rate is within the range of acceptable charge rate for LiFe batteries. The maximum capacity was approximately 490 mah in each cell, The full capacity voltage was as expected. A second cycle of both batteries yielded the same capacity. This is quite a bit lower than the expected 650 mah stated on the cells.
Update 10/10/.2023
Without prompting on my part, Shockli offered a refund for the batteries. I had not anticipated that level of standing behind their product. I have changed my overall rating to reflect my view.

United States on Oct 06, 2023

Nathan Smith: As far as I can measure, the batteries have the capacity they claim (if not a tad more). None of them have obvious shunts or other problems. It's a low bar to clear, but it's one a lot of other products unfortunately don't.

United States on Feb 20, 2023

CJ C works in I.T.: Bought these to use in a "4xAA" battery case for an amateur radio handheld transceiver to increase the voltage from the AA 6 volts nominal to the LiFePO4 12.8 volts nominal, allowing for a doubling of transmit power over AAs on the particular radio being used. Granted, the 650 mAh is not much at all for a high drain device, but this would be sufficient for short transmissions and conversations. Unfortunately, the radio was left on accidentally to the point it started cutting off, so I popped the battery pack out and placed the cells on the charger. I found that one of the four would no longer even accept a charge. I don't know how a solar light (for which these are advertised) would *not* discharge fully overnight during use, but if they do run until the battery is dead, they'll cause similar damage.
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I do realize these are not marketed for ham radio use, and I'm not an idiot, I do know the low mAh rating wouldn't be much. I was, however, more concerned with voltage than capacity; I could have easily bought Lithium ion cells, but with the 4.2 volts they have when fully charged, I would need to use only three cells with a dummy fourth cell to keep voltage below 15...

United States on Jun 08, 2021

Funkawa Shockli AA Size Lithium Iron Phosphate 650mAh Rechargeable Battery Panasonic K-KJ55MCA4BA: 3-Hour Quick Charger for Advanced Individual Batteries Duracell CopperTop AA and AAA Alkaline Battery Combo Pack
Funkawa Shockli AA Size Lithium Iron Phosphate 650mAh Rechargeable Battery Panasonic K-KJ55MCA4BA: 3-Hour Quick Charger for Advanced Individual Batteries Duracell CopperTop AA and AAA Alkaline Battery Combo Pack
B2B Rating
79
97
96
Sale off $7 OFF
Total Reviews 49 reviews 67 reviews 51 reviews
Voltage 3.2 Volts 1.2 Volts
Unit Count 4.0 Count 56
Number of Batteries 4 AA batteries required. 56 AA batteries required.
Batteries 4 AA batteries required. 4 AA batteries required. 56 AA batteries required.
Manufacturer shockli Sanyo Duracell Distributing, Inc
Date First Available May 7, 2019 June 1, 2016 September 9, 2021
Item Weight 2.39 ounces 8.3 ounces
Battery Cell Composition Lithium-Phosphate Alkaline
Brand funkawa Eneloop DURACELL
Customer Reviews 4.3/5 stars of 759 ratings 4.8/5 stars of 36,124 ratings
Best Sellers Rank #85,372 in Health & Household #306 in AA Batteries #2,938 in Health & Household #20 in AAA Batteries#25 in AA Batteries
Package Dimensions 2.32 x 2.09 x 0.67 inches
ASIN B07RGQX6W7 B01G3SS04A B09FVKV32D
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