paleblueUSB Rechargeable 9V Batteries (2-Pack) - 4500mWh Lithium Ion, 1000+ Charge Cycles, Includes 2-in-1 USB-A to USB-C Charging Cable, LED Charge Indicator, 3.4 Hour Charge Time

Pale Blue's Rechargeable 9V Smart Batteries offer a convenient and eco-friendly alternative to disposable 9V batteries. Here's a close look at their features and potential drawbacks:Pros:Cost-Effective: While the upfront cost is higher than disposable batteries, these Pale Blue rechargeables can replace over 1000 single-use batteries, leading to significant savings in the long run.Fast Charging: The batteries can be fully charged in under 3 hours, making them ideal for replacing depleted batteries quickly.High Capacity: With a 500 mAh capacity, these batteries should provide ample power for most 9V devices.Long Lifespan: Pale Blue advertises over 1000 recharge cycles per battery, significantly reducing waste compared to disposable batteries.User-Friendly: The included USB-C charging cable makes charging convenient, and the LED indicator clearly shows the charging status.Cons:Higher Initial Cost: As with most rechargeable batteries, the initial purchase price is higher than disposable batteries.Limited Availability: While these batteries seem to be gaining traction, they might not be as widely available as traditional disposable batteries.Compatibility: Double-check that your devices are compatible with rechargeable 9V batteries before purchasing, as some electronics may not function properly with them.Overall:Pale Blue's Rechargeable 9V Smart Batteries are a great option for environmentally conscious consumers who want to save money in the long run. The fast charging, high capacity, and long lifespan make them a compelling alternative to disposable batteries. However, the initial cost and potential compatibility issues are factors to consider before buying. If you frequently use 9V batteries and your devices are compatible, these rechargeable batteries from Pale Blue are a sustainable and cost-effective choice.

High quality batteries. Glad I sprung for PBE.

Amazing rechargeable batteries. Easy to tell if they are charging or charged fully. They seem to last 2x longer than my other batteries.

**Update** I was able to get a response from the Q&A section on their website and they sent me a replacement for the non-operable battery. I have updated them to four stars for following through with their warranty. They also replied to my amazon review. I can't give them a full 5 stars as I think the process to get in contact with them for these warranty issues should have been more straight-forward and should have been handled from the email I sent instead of have to work through a Q&A section or leaving a poor review to get in contact with them. If they fix this process in the future I would give 5 stars for both the product and them standing behind the warranty.***One out of the two batteries will not work. I didn't put them in use immediately so past the amazon return window.If you decide to purchase I recommend testing immediately so you have the amazon return option in case you get one that is defective. Have been attempting to contact the customer service with no luck. No phone number that I have found so far. Sent two emails with no reply. I have other sizes of their batteries and have been happy with them. The one of these 9v that works seem to be on par with my other batteries from them. Just can't justify the cost if you are risking getting a non-operable battery. Lack of customer service is super disappointing. Can't seem to be able to leave a review on their site either.

Love these. They have lasted a long time whereas others have stopped working after a short number of charge cycles.

I use these on my guitar. I go through a battery every week so it was getting expensive. I now use paleblue and trust them. No power drop off until the 70% discharge.I would've used a whole pack of Duracell s by now!

delivered on time great product

I bought these to use in a TENS machine (electrical muscle stimulator for stiff muscles). Ordinary 9v batteries only last for a couple of sessions, but these can be recharged and reused. The cost for each is roughly double the cost of an ordinary 9v battery, so after about two recharges you are money ahead, plus you produce less electronic waste. I also have these in AA and AAA sizes. Love them all.