What is the max, safe, charge rate of these batteries? 2C? 3C?
1650433
1C is always the standard. 2C is posssible, but will reduce the life of the battery and increase (however small) the risks of damage or fire. 3C is definitely pushing it. Batteries that can take a charge above 1C are usually in the 30+ C rating for discharge. I would not charge a 15C battery above 1C.
2177723
the warranty on these batteries is less than 6 months. i purchased 40 of them 2 years ago, and 6 went bad after 2 charges. it was more than 6 months after i purchased them, since i only use them in the fall, so the warranty was useless. i had to eat the loss. 6 out of 40 is, to me, not an acceptable loss.
1974244
These batteries will charge in an hour. Two hours, two batteries... Or close to it
2264744
The printing on the batteries themselves says "2400 mAh". I ran them through a full test on a LaCrosse battery charger I have (full charge, then full discharge, then full recharge to count the capacity) and it said 2500 mAh. So I think at least with the ones I have, I can assume the 2400 mAh printed on the batteries themselves is accurate. I also submitted a request for them to change the "product details" to reflect what's printed on the batteries.
1551083
As far as I know, they charge up to 4.2V. The 3.6V value is a relative term, as the battery changes voltage constantly while discharging.
1026480
i think they are 2.0. Mine fit well and are not loose as some have reported. good strong fast charges so far. from20% to 80% in 20 minutes.
2095310
I measured 28.3 V right after charging them. One battery after sitting unused for weeks was reading exactly 28V. The battery is rated at 28V and 76 Wh lithium Ion. My old batteries are rated at 28 V and 3.0 Ah. My old batteries date back to August, 2006 and still have power but don't really last too long. I definitely needed new batteries and these are strong...but expensive.
14143
No problem with them. They are a lot better than the original battery that came with my Sony camcorder. Holds a charge longer and also chargers faster. Hope this help's you.
118966
My experience thus far is 3 hour charge capacity. I have no complaints about the quality aspects for the price that I paid. Hope this hels
1961336
I can't say. I always charge all my batteries before I leave home. These batteries showed no loss of charge after two weeks and lasted slightly longer, took more photos, than a one year old Nikon OEM battery. I can recharge from my vehicle lighter socket so beyond two weeks or a month is not important to me. Given their similar discharge rate in use, I would guess that the discharge rate in storage would be similar as well, but I can't say for sure.
133359
You need have a proper Lithium ion/polymer (same thing!) charger. They will measure the voltage, and if it is below 3V, it will charge at a very low rate until the voltage is higher than 3.00V, when the standard 1C charging rate will kick in. (for this battery, 1C * 0.38AH = 0.38A) Sometimes you can go above this charging rate if the battery can handle it. After The battery begins to peak at around 4.00V, a constant voltage of 4.2V is applied and the current falls to 0.1C. After reaching 4.20V, the charger then turns off and lets the battery 'rest'. Once the voltage begins to fall, it kicks back in again. You need have a proper Lithium ion/polymer (same thing!) charger. They will measure the voltage, and if it is below 3V, it will charge at a very low rate until the voltage is higher than 3.00V, when the standard 1C charging rate will kick in. (for this battery, 1C * 0.38AH = 0.38A) Sometimes you can go above this charging rate if the battery can handle it. After The battery begins to peak at around 4.00V, a constant voltage of 4.2V is applied and the current falls to 0.1C. After reaching 4.20V, the charger then turns off and lets the battery 'rest'. Once the voltage begins to fall, it kicks... » Read More You need have a proper Lithium ion/polymer (same thing!) charger. They will measure the voltage, and if it is below 3V, it will charge at a very low rate until the voltage is higher than 3.00V, when the standard 1C charging rate will kick in. (for this battery, 1C * 0.38AH = 0.38A) Sometimes you can go above this charging rate if the battery can handle it. After The battery begins to peak at around 4.00V, a constant voltage of 4.2V is applied and the current falls to 0.1C. After reaching 4.20V, the charger then turns off and lets the battery 'rest'. Once the voltage begins to fall, it kicks back in again. « Show Less
2145200
Rated for 1800 Charge Cycles. 750mAh minimum. 1.2 Volt single cell. Ni-MH (Nickel-Metal Hydride) construction. Low self discharge rate compared to most other rechargeables - holding 90% 1st year and 70% in 5th year. These don't go dead in storage like normal rechargeables so you can go ahead and keep spares hot and ready to go. Brands I was using where always dead or close to it if I precharged before need. These eliminate that terrible feature found in other rechargeables. These are just like having alkaline on hand, except you can recharge these 1800 times. I converted to the Eneloop rechargeables about 3 years ago, this is the 3rd generation. 1st generation rated for 1000 charge cycles, 2nd generation for 1500 charge cycles and this 3rd generation 1800 charge cycles. I couldn't say if this is true or not as I have not lost charging on any of my Eneloop batteries. Since you aren't going to be in the situation of needing to rapid charge one of these for immediate use, I recommend that you go with the gentler slow charging SANYO 4-Position Ni-MH Rechargeable Battery Charger which works with any of the generations of Eneloop AA or AAA batteries. Sanyo/Eneloop batteries are now coming on the market in the 4th generation which is rated for 2100 Charge cycles (part #BK-4MCC). In my opinion the current best value is the 3rd generation as I can not see any additional practical value in the 4th generation. I have converted every battery device in my home to the Eneloops (except safety devices (smoke/carbon monoxide detectors and like), which need alkaline).
1970086
I generally put it at 0.2 amps. I'm sure you could go up to 0.3 but I don't recommend it, will charge fine at 0.2A.
327568
I would do one of two things. Charge them for 24 hours. Or send them back. Mine only lasted about 3 charges. That still put them roughly the price of a good disposable battery, but these are not high quality.
2134215
Since they are rechargeable, I have no idea how many times you can charge them. However, we've never had them discharge fully but only use them a maximum of 3-4 hours at a time with no problems.
1267051
I purchased 3.7V 18650 3000mah Rechargeable Batterys. They seem to work well. I've used them for about a year so far.
1434995
1.2V Will not work in any toys or other things that require 1.5V. They also get very hot, while charging. Not a safe battery. Hope that helps.