Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Can you leave batteries in the charger for a week or two after fully charged?
Document: this product was approvedby steve harris from 1234 solar.com. i trust his judgement and wasn't disappointed when i got this charger. with this charger and couple dozen of AA andAAA batteries i will never have to buy another battery for my small electronics ever again. the sharger was very easy to work, just put either AA or AAA in the slot and within a hour or two they are ready to go. it has a monitor to tell you how the battery is charging or when it is fully charge.
This charger is great. It holds 8 AA or AAA batteries at a time and each battery has its own display as to charge state. Charges them in a reasonable amount of time. I have never tested it but overnight all the batteries will be charged. Will also shut off charge when battery is fully charged. I use it with eneloop batteries and just rotate them to keep them charged and in all my devices.
Charges well. Can charge 1-8 batteries at the same time instead of charging in pairs. Tells you when each battery is fully charged. I'm going to buy another.
it seemed great at first, after about 6 months it was not fully charging batteries, the same batteries would charge fine on other chargers (including brand new Powerex batteries). After a year it completely died, screen barely shows up, my 15 year old $10 china charger still working. This is a complete waste.
As a wedding photographer, I greatly depend upon batteries for my two flashes. I've tried several batteries and battery chargers, but it seems like this product is the best. First off, I like how you can charge a couple sets of batteries in just a few hours. 15-minute chargers are simply not good for professional needs.This Powerex. charger is small and lightweight and easy to configure.
I got this battery charger in July and waited to review it until I used it for a while. It works great just as advertised.I used one of the chargers sold by a battery company before I got this and had problems with some batteries going dead very quickly after a charge. The same batteries do not have this problem using the Powerex charger.I would give this a 5 star rating except the charger only has two charge rates.
I purchased this charger to recondition some older NiMH batteries that were dying quickly and become my go to charger for pre-wedding shoot battery charging. The charger did a great job refreshing some older Kodak and Pearstone brand AA batteries. I also purchased some new Powerex batteries and they worked very good too after a soft-charge. My only gripe is that the two battery readouts on the far left side of the display are dim compared to the other six.
I hate using Dumb Chargers because you never know if you are over or under charging your batteries.All the literature warns that you can severely reduce the life of your rechargeable batteries if they are not charged properly. This charger gives the charge status for each battery and will not overcharge them.
When I woke up the next morning, i grabbed my coffee and checked on the batteries. To me surprise, it found, and charged them. I put the batteries in my litte r/c car and they worked like new! I recommend this charger as it worked for me! :)
Wow! what a difference this charger makes. The batteries are charged to a higher level (I can see the difference with my bike lights! ), it is quite quick and I love that it tells me the charge level visually. It also does not overcharge. I am delegating all my other chargers to the bin!.
Answer: It might make the batteries not recharge quite as many times, but I do it all of the time and have had my batteries (Enloop) and the charger for more than a year.  I do recommend that the charger be put in "soft charge" mode if you are going to leave the  batteries in for more than 4-12 hours.