popularLobbymonster posted Today 06:17 AM
Item 1 of 7
Item 1 of 7
popularLobbymonster posted Today 06:17 AM
TENAVOLTS 1.5V Lithium Rechargeable AAA Battery with USB Cable Type C Port (4 pack) $13.99
$14
$35
60% offWoot!
Get Deal at Woot!Good Deal
Bad Deal
Save
Share
Leave a Comment
12 Comments
Sign up for a Slickdeals account to remove this ad.
I haven't really seen the use of switching to a Lithium rechargeable from my Eneloop standard/pro's. They are new to the market and seem super expensive. Also the major players in the rechargeable AA/AAA market (Energizer, Eneloop, Ikea Ladda, etc) haven't offered a Lithium version yet that I've seen, so can't exactly compare quality with so few competitors.
That said, I have heard of Tenavolt. Very little reviews on Amazon (not hard to hit a good rating in only 40 reviews if paid, decent if not). Reviews say they last a while but die quickly once they hit 70% which makes sense because they're intended to hold a constant 1.5v through the full charge instead of dropping voltage slowly like traditional rechargeables. They claim fast charging at less than 2 hrs, 1000 cycles, and high capacity.
If you're using rechargeables right then you don't care how fast they charge since you should always have fully charged backups ready to swap in immediately while you charge the dead ones. So that's not really a benefit to me.
The capacity is a bit confusing. Most of the references on Amazon say mWh instead of mAh, the standard metric used for battery capacity. Though I did find one picture that references mAh. If mWh is an error and they are truly mAh, then we can compare to others and the values advertised are higher than any other rechargeable AA/AAA I've seen. For AA, Tenavolt claims 2775 mWh/mAh versus Eneloop Pro's 2600 mAh. For AAA, Tenavolt claims 1110mWh/mAh versus Eneloop Pro's 980 mAh. So not really a big difference, but higher. A quick search on Amazon shows others advertising as much as 3600 mAh AA's, but there doesn't seem to be good third-party testing to verify claims of lithium batteries yet.
1000 cycles is twice as many as advertised for Eneloop Pro's, while also having higher capacity than the pro's. Still half the cycles of standard Eneloop, but 1000cycles for that high capacity seems great.
At $8.75/battery regular price, the Tenavolts don't offer enough benefit to justify the price to me. $3.50/battery from this deal is much more reasonable, but again without a lot of data out there to backup claims, not sure these are really better than Eneloop Pro.
Worth a shot?
I haven't really seen the use of switching to a Lithium rechargeable from my Eneloop standard/pro's. They are new to the market and seem super expensive. Also the major players in the rechargeable AA/AAA market (Energizer, Eneloop, Ikea Ladda, etc) haven't offered a Lithium version yet that I've seen, so can't exactly compare quality with so few competitors.
That said, I have heard of Tenavolt. Very little reviews on Amazon (not hard to hit a good rating in only 40 reviews if paid, decent if not). Reviews say they last a while but die quickly once they hit 70% which makes sense because they're intended to hold a constant 1.5v through the full charge instead of dropping voltage slowly like traditional rechargeables. They claim fast charging at less than 2 hrs, 1000 cycles, and high capacity.
If you're using rechargeables right then you don't care how fast they charge since you should always have fully charged backups ready to swap in immediately while you charge the dead ones. So that's not really a benefit to me.
The capacity is a bit confusing. Most of the references on Amazon say mWh instead of mAh, the standard metric used for battery capacity. Though I did find one picture that references mAh. If mWh is an error and they are truly mAh, then we can compare to others and the values advertised are higher than any other rechargeable AA/AAA I've seen. For AA, Tenavolt claims 2775 mWh/mAh versus Eneloop Pro's 2600 mAh. For AAA, Tenavolt claims 1110mWh/mAh versus Eneloop Pro's 980 mAh. So not really a big difference, but higher. A quick search on Amazon shows others advertising as much as 3600 mAh AA's, but there doesn't seem to be good third-party testing to verify claims of lithium batteries yet.
1000 cycles is twice as many as advertised for Eneloop Pro's, while also having higher capacity than the pro's. Still half the cycles of standard Eneloop, but 1000cycles for that high capacity seems great.
At $8.75/battery regular price, the Tenavolts don't offer enough benefit to justify the price to me. $3.50/battery from this deal is much more reasonable, but again without a lot of data out there to backup claims, not sure these are really better than Eneloop Pro.
Worth a shot?
The last time I looked into this kind of battery, I discovered that they had a lot of problematic issues. I doubt anything has changed in the last two years, or they would be more popular.
Bad in low-drain usage
Bad longevity (few recharge cycles before they die)
Debouncing issues when empty
Expensive, low-value
A word of caution is that you need to keep these separate from NiMH rechargeables and not accidentally use them in a standard charger, only with a charger designed for lithium. Never did it but recall reading that not only would it not work but could potentially damage the battery or worse. Also, likewise probably damage NiMH if used in the Tenavolt supplied charger..
I haven't really seen the use of switching to a Lithium rechargeable from my Eneloop standard/pro's. They are new to the market and seem super expensive. Also the major players in the rechargeable AA/AAA market (Energizer, Eneloop, Ikea Ladda, etc) haven't offered a Lithium version yet that I've seen, so can't exactly compare quality with so few competitors.
That said, I have heard of Tenavolt. Very little reviews on Amazon (not hard to hit a good rating in only 40 reviews if paid, decent if not). Reviews say they last a while but die quickly once they hit 70% which makes sense because they're intended to hold a constant 1.5v through the full charge instead of dropping voltage slowly like traditional rechargeables. They claim fast charging at less than 2 hrs, 1000 cycles, and high capacity.
If you're using rechargeables right then you don't care how fast they charge since you should always have fully charged backups ready to swap in immediately while you charge the dead ones. So that's not really a benefit to me.
The capacity is a bit confusing. Most of the references on Amazon say mWh instead of mAh, the standard metric used for battery capacity. Though I did find one picture that references mAh. If mWh is an error and they are truly mAh, then we can compare to others and the values advertised are higher than any other rechargeable AA/AAA I've seen. For AA, Tenavolt claims 2775 mWh/mAh versus Eneloop Pro's 2600 mAh. For AAA, Tenavolt claims 1110mWh/mAh versus Eneloop Pro's 980 mAh. So not really a big difference, but higher. A quick search on Amazon shows others advertising as much as 3600 mAh AA's, but there doesn't seem to be good third-party testing to verify claims of lithium batteries yet.
1000 cycles is twice as many as advertised for Eneloop Pro's, while also having higher capacity than the pro's. Still half the cycles of standard Eneloop, but 1000cycles for that high capacity seems great.
At $8.75/battery regular price, the Tenavolts don't offer enough benefit to justify the price to me. $3.50/battery from this deal is much more reasonable, but again without a lot of data out there to backup claims, not sure these are really better than Eneloop Pro.
Worth a shot?
I have about 12 of these in aa/AAA form. If these were aa I'd be picking up more. This is a phenomenal price...
Sign up for a Slickdeals account to remove this ad.
I haven't really seen the use of switching to a Lithium rechargeable from my Eneloop standard/pro's. They are new to the market and seem super expensive. Also the major players in the rechargeable AA/AAA market (Energizer, Eneloop, Ikea Ladda, etc) haven't offered a Lithium version yet that I've seen, so can't exactly compare quality with so few competitors.
That said, I have heard of Tenavolt. Very little reviews on Amazon (not hard to hit a good rating in only 40 reviews if paid, decent if not). Reviews say they last a while but die quickly once they hit 70% which makes sense because they're intended to hold a constant 1.5v through the full charge instead of dropping voltage slowly like traditional rechargeables. They claim fast charging at less than 2 hrs, 1000 cycles, and high capacity.
If you're using rechargeables right then you don't care how fast they charge since you should always have fully charged backups ready to swap in immediately while you charge the dead ones. So that's not really a benefit to me.
The capacity is a bit confusing. Most of the references on Amazon say mWh instead of mAh, the standard metric used for battery capacity. Though I did find one picture that references mAh. If mWh is an error and they are truly mAh, then we can compare to others and the values advertised are higher than any other rechargeable AA/AAA I've seen. For AA, Tenavolt claims 2775 mWh/mAh versus Eneloop Pro's 2600 mAh. For AAA, Tenavolt claims 1110mWh/mAh versus Eneloop Pro's 980 mAh. So not really a big difference, but higher. A quick search on Amazon shows others advertising as much as 3600 mAh AA's, but there doesn't seem to be good third-party testing to verify claims of lithium batteries yet.
1000 cycles is twice as many as advertised for Eneloop Pro's, while also having higher capacity than the pro's. Still half the cycles of standard Eneloop, but 1000cycles for that high capacity seems great.
At $8.75/battery regular price, the Tenavolts don't offer enough benefit to justify the price to me. $3.50/battery from this deal is much more reasonable, but again without a lot of data out there to backup claims, not sure these are really better than Eneloop Pro.
Worth a shot?
If you are curious, and just want to 'dabble' this is one of the best prices for one of the better batteries of this type and SIZE. I have a dozen Tenavolt AA. Had for years, use routinely and they work fine and are holding up. Some applications really benefit from the steady 1.5v.
I DO NOT have the Tenavolt AAA but a buddy got some and I tested them at about a year old, I have ordered a set (already have the charger) to see how they perform and hold up for the 'long haul'.
mWh vs mAh is 'annoying' but technically more accurate for 3.7v lithium. They DO have more energy, but that energy has to be down converted to 1.5v. There is a price to pay for this.
Just divide mWh/1.5 >mAh.
Tenavolt AAA 1.5v Li - 1110mWh/740mAh (claimed):
590mAh/0.2A, 570/0.5, 560/0.7, 515/1.0A Amz 5/3/23 Tested 1 year old
Tested on a dedicated, constant current dis-charger (not a 'smart charger on discharge). This is a very accurate and reliable test bed.
As you can see, they don't meet capacity. Almost NONE of this chemistry EVER do. The ones that can are VERY expensive.
MOST of the cheap AAA of this sort are more like this (pathetic):
HuaHui Energy AAA 1.5v Lithium x4600mWh = 400mAh:300-350mAh/0.2A; Amz $15 12/18/2020
That is the 'better' of several different brands of AAA. The others are more in the 300-370nAh range at low draw, and drop as the draw goes up. Less than half of a regular NiMh AAA. Not good at all.
I advise staying away from USB charging type. People get excited about the ease and tech + not having to have yet another charger (YES, you do need a special NON-NiMh charger). They will NOT charge in a regular charger.
Charging is via 5v USB. The CHARGE CONTROL IS INSIDE THE BATTERY.
The USB port takes space in a VERY SMALL container, so capacity is further compromised.
The size limitation compromises this chemistry pretty severely.
The REAL longevity is still in question. I SERIOUSLY doubt 1000 cycles.
NOTE: Eneloop Pros have more capacity at the expense of longevity. This is true for ALL high capacity NiMh. Internal resistance goes up WAY faster and performance goes down. Try not to be fooled by that 'bait' also. Capacity is only ONE metric in testing.
A word of caution is that you need to keep these separate from NiMH rechargeables and not accidentally use them in a standard charger, only with a charger designed for lithium. Never did it but recall reading that not only would it not work but could potentially damage the battery or worse. Also, likewise probably damage NiMH if used in the Tenavolt supplied charger..
I've been using smartoools brand (half green half white, $1.66 per battery) from aliexpress for 2 years now, it's been very consistent.
Even compared to nimh batteries from Amazon like Amazon basics and EBL, the liion 1.5v are far far more resilient and less duds.
I'm trying out the soshine brand (black w/red stripe $1.66 per batt) now and they seem really good too. Never going back to nimh
I've been using smartoools brand (half green half white, $1.66 per battery) from aliexpress for 2 years now, it's been very consistent.
Even compared to nimh batteries from Amazon like Amazon basics and EBL, the liion 1.5v are far far more resilient and less duds.
I'm trying out the soshine brand (black w/red stripe $1.66 per batt) now and they seem really good too. Never going back to nimh
It's convenience vs capacity. Personal choice. Since they are impacted, I value capacity, I now don't get that kind. I also have 3 different chargers and they are mostly interchangeable. Even the USB style charge in them OK.
I'm guessing you haven't done actual capacity tests. MOST of the AA turn out ~70-80% of claimed capacity. The very best of the 7 brands I've test comes out to 2000mAh (Sinceholy non-USB 3600mWh), getting it in the running with standard Eneloops. No idea of rate of self discharge. That info is hard to find.
The rest......1270mAh at the low end (Cicnod USB-3300mWh/2200mAh) pretty lousy 58%. Up to 1880mAh (HW non-USB-3500mWh/2333mAh claimed) 80%,not too bad for this kind of cell.
Leave a Comment