****** - Verified Buyer
4.5
2022-09-22.When it comes to batteries, there much more than meets the eye. In addition to the many different sizes of batteries, there are many different compositions, and power delivery. There are Carbon-Zinc; Zinc-Manganese Dioxide; Li-Ion; Ni-MH; Ni-Cd; LiPo, and the list goes on.But before I waste your time, you first need to know whether rechargeable batteries are right for your application. The answer is simple, if you find yourself constantly buying disposable batteries for an application, then you should consider using rechargeable batteries.Now that you know you need rechargeable batteries, which ones should you get? Once again we need to go back to the application to determine this. The most common types of rechargeable batteries will consist of the following chemistries: Ni-Cd (Nickle Cadmium), Ni-MH (Nickle Metal Hydride), and Li-ion (Lithium Ion).When it comes to rechargeable batteries, here are some of the things you need to consider:1. Number of rechargeable cycles2. The amount of power it can discharge (drain)3. The rate of self discharge4. Memory effect5. Energy DensityThis review will focus on these five factors for each type of battery in the lower capacity (< 2000mAh) category .Nickel Cadmium (Ni-Cd).Number of charge/discharge cycles: 400-600Discharge (drain): supports both high and low drain devicesRate of self discharge: ModerateMemory effect: YesEnergy Density: LowNi-Cd batteries are a pretty versatile in the sense that it can support both high drain as well as low drain devices enabling it to be used pretty much across the entire spectrum of electronic devices. They perform well in any climate whether it be stifling heat or freezing cold. And they have the ability to pack a punch and can release more power on demand without becoming damaged. Ni-Cd rechargeable batteries best suited for high frequency use items and devices that require large amounts of power to function. Common uses include Cordless Phones, Walkie Talkies, Portable Radios, Flashlights, and Portable Medical Equipment.Nickel Metal Hydride (Ni-MH)Number of charge/discharge cycles: 800-1000Discharge (drain): low drain devicesRate of self discharge: Mid-HighMemory effect: NoEnergy Density: Mid-HighNi-MH are best suited for low drain applications with high energy consumption and demand (digital cameras, flashlights, toys). Essentially applications where you want the battery drained within a month. Memory Effect is when a battery must be fully drained before recharge or their capacity is reduced. Ni-MH rechargeable batteries do not develop a memory effect and can be recharged at anytime during usage cycle. Ni-MH batteries are not well suited for low energy draw devices like clocks and TV remotes; its high self discharge rate (about 1% per day) would also mean that Ni-MH would not be well suited for things like smoke detectors (unless you like swapping out your batteries every 3 months).Lithium Ion (Li-ion)Number of charge/discharge cycles: 300-500Discharge (drain): supports high and low drain devicesRate of self discharge: Very LowMemory effect: NoEnergy Density: MidLi-Ion batteries solves the problems associated with both Nickel based rechargeable batteries, they can deliver full voltage with developing any memory loss. The caveat here is that Li-Ion batteries deliver 3.7V and not the lower rates of 1.2V or 1.5V. The very low rate of self discharge makes this type of battery very useful for applications like Cell Phones, Laptop Computers, and Tablets.I had purchased these batteries by Tenergy to replace those in my solar lights. With a capacity of 1000mAh, it's a bit of overkill as 300-600mAh would be more than enough to last from dusk to dawn, but I figured these are without memory effect so keeping them charged will not be a problem. I've purchased these batteries before and they worked well. They last 2-3 years in my solar lights that are out about 1/2 the year. At about a buck a piece, they're a low cost solution in keeping my garden lights lit through the night.I replaced my solar lights because they all went dead at the same time. They are almost as bright as they were when they were new.ValueUsed for outside solar lights. So far they are doing the job.I tested all the batteries a few of them were lower than full. Fortunately I have a tenergy battery charger. I put them all in charged them in a few hours to full. They work and all of my solar lights beautifully.Seems to be good, but to early to tell.Fully charged right out of the box. Replaced batteries in solar lights around the house. Excellent product and priceMade a big difference in the backyard with our lawn lights. Worth the price.La verdad cuando leí las reseñas estaba dudoso en comprarlas, pero me arriesgue porque era la mejor opción en cuanto a cantidad de baterías por el precio, yo tenía 6 lámparas solares las cuales sus baterías ya no funcionaban, al llegar las instale y me sorprendí de que vinieran precargadas, al siguiente día se cargaron con sol y prendieron al anochecer, en cuanto vida útil no se porque apenas es el tercer día de uso!If you wish to purchase old used batteries, please give me your money and I will send these to you. I have replaced over half of these batteries in a matter of days, as they are used for outside solar lights. They work for 1 hour and then do not take a charge and need to be replaced. Very disappointed in the quality of these batteries or lack of quality.I replaced all of the batteries in my solar lamps in early Spring and they barely last 4 hours per night.I have had to replace them all again in the Fall.Would not recommend this product.Positive terminal is not long enough.Does not make contact on terminal connections in my lights.Obvious length difference when compared side by side with other brands.Unusable for my use.Bought 36.... non held the charge. Just put them into the solar lights after charging not one worked or won't last 15 seconds. Purchased one year ago????? 36 × 4 screws per light not a happy camper.
