****** - Verified Buyer
4.5
I discharged these right out of the box and they met the capacity spec. Charged at 1A and discharged at 0.5A (C/10). The cells tested at 5021, 5128, 5021 and 5131 mA-hr. I was presently surprised on the performance of these cells.They arrived around 50% charged.Seem to be good batteries, had to charge and discharge them about 4 times to get them up to advertised capacity.Tenergy is the go to brand for both live events and film and TV production studios.I have used them for years - go for the best. Excellent customer service should the need arise.I always had good luck with Tenergy batteries, and see no reason to think otherwise with these. These are the Tenergy 'premium' line, and I haven't had them long enough to know how many charges they will last, but they do seem to last a bit longer per charge than the Tenergy standard line.I am moving to putting rechargeable batteries everywhere it is practical, for two reasons. First, keeps acid and chemicals out of landfills, and second, I have yet to have a rechargeable battery leak and damage the device I put them in. Yes, if run down and ignored for a long time, they are stone cold dead, but at least they are not sitting in a blob of acid and corrosion.I have always had good luck with Tenergy rechargeable batteries, and they had worked well for me in all my electronic products I use them in.Came nicely packaged and easy to get out of the package.[Capacity:]Tenergy seems to have world wide the highest rated capacities for rechargeable NI-MH batteries.Looks like Tenergy has almost maxed out of whats technically possible.No other maker has these capacity range, hats off !!Even the best Japanese makers have max roughly only 60% capacity (3000 mah), again respect for this !!It's awesome how much capacity this rechargeable batteries have.[Weight:]Lets face it, batteries are heavy. Capacity limits and weight are probably their worst obstacles.Fortunately the extended capacity plays as advantage as you might come by with one battery pack where you usedtwo or more in the past. This comes in VERY handy when either every gram counts or stamina is everything.[Charging:]We all know that increased capacity not only gives you better mileage but also requires fewer (but long) charging cycles.Generally speaking high capacity is a good thing but long charging times might be a turn off when you are in hurry.In addition quick charging or charging to often (to early) might decrease life cycle of the battery (read: damage it). So itmakes sense that you also invest in an "intelligent" charger, that checks the battery status, de-charges it controlled andrecharges it gently. This way your investment is protected.[Usage:]So far I have used those batteries and haven't realized any significant drop of capacity.Its to early to tell the long term quality of the product, however so far everything isindicating a good quality product.I will update this section in regular intervals to indicate any capacity changes.---[Summary and target user:]---I am conservative. For the technology and capacity alone I would easily give 5 or even 6 Stars. I understand that 5.000mahis a capacity that is almost unheard off and more likely bike batteries have it.For the average user even 50$ + charger cost is a deep price to pay, so its not a deal for occasional uses.HOWEVER, for power sucking heavy usage this is a steal, especially if you MUST HAVE the extended stamina.5 Stars for heavy users4 Stars for average users ((Reason is initial cost)Enjoy the ride !!Works well, you must have a charger to charge them.Poor holding of chargeCes piles pis de la marde c est pareil....ne tiennent pas la charge.....great product . Has good capacity "Great set of batteries, very happy with purchase.Batteries are well packed and fully charged.
