[Li-Ion] Coast “AA” Rechargeable Batteries 4 Pack, Model #30982 is a GREAT set of batteries. These batteries each have a built-in Type C charging port, and the 4 lead Type C charging cable is included with the batteries. The nice feature of this charging cable is that the input side has a standard USB Type A along with a Type C conversion adapter so it can be used with literally any traditional cell/smartphone as the charging power source. As a result of this unique charging cable, you now no longer have to carry/use a bulky charger base to recharge the batteries. I really like the fact that each battery has its own LED (Light Emitting Diode) indicator charge light (red while charging and green when completely charged) and each rechargeable battery has the Coast overcharge/discharge protection circuit to protect the operating of life the battery. Depending on the charge that remains in the battery when it is recharged will determine how quickly the battery recharges to maximum strength, usually in a half to one hour time period. The rechargeable battery size is the same dimensions when compared the same size non-rechargeable battery, so they fit and work great in flashlights, radios, etc. where you have used traditional, non-rechargeable batteries. I really like the fact these batteries are corrosion resistant as I have ruined some flashlights in the past with traditional leaky batteries when they die. These batteries are an excellent choice to use in order to be environmentally responsible compared to the traditional throw away batteries! According to Coast, these batteries can be recharged up to 1,000 times so I am very impressed. This represents true cost savings when compared to buying traditional non-rechargeable batteries. I am a true believer in the performance of these Coast rechargeable batteries!

[0.415 lb] I can charge 4 batteries at the same time with the 4 headed usbc cable which can be attached to a standard USB port or a usbc, as you are supplied both options. The batteries have a small indicator light to show when fully charged, red for charging, green for charged. this is a very practical design and works great.

[12x AAA] These batteries may seem a little bit high priced, but let me tell you for the price you pay that shirt to pack a punch. They are amazing. They are the strongest, longest lasting and durable convenient batteries I’ve ever use that were rechargeable I put them in the coast, headlamp and flashlight and that runs for 2 to 3 times the duration of the runtime of the light on top of the convenient and easy for USB-C charging plug adapters that come with them makes them even more amazing. Absolutely amazing love them and will start buying these now instead of leaving competitor ones that are nowhere near the quality. Another great product thanks coast!

[1.5 V] Love the idea. A little pricey, but worth the convenience and portability. Only working off my original charging, so I can't give a long term review yet. I'll be back later.

[Li-Ion] Exceed expectations...well made & ingenious way of charging batteries

[1000] Awesome upgrade from regular batteries. Works well and last longer

[0.415 lb] Works as intended, charges and works well in my lights.

[Li-Ion] I bought a Coast headlamp that did not come with rechargeable batteries ,so you ordered a 4 pack of the rechargeable aaa batteries, I was and still surprised at how long they last and stay bright on full power .and since they are versatile unlike any other rechargeable headlamps I will continue to buy your great products.
keep up the good work I look forward to what you will come out with.

[Li-Ion] I will definitely purchase more of these in the near future. Started with the AA batteries. I love the idea of the usb charge, especially with todays electronics. They hold a charge for a long time. Next i will purchase the AAA batteries.

[0.415 lb] I bought this item because I was sick of going through batteries for my pocket pen light. I really like that there is 4 batteries in the pack and each battery has its own charging port, as well as the supplied charging cord being able to charge all 4 batteries at once. I have been using these batteries for a couple months now and I will say for a rechargeable battery the run time is pretty darn good.