GREAT BATTERY..  HAVE SEVERAL
358661
Solar panels are great but people seem to think that they will get maximum output from their panels throughout the daylight hours. Not going to happen unless it's a bright sunny day and it's mounted on a tracking system where it follows the sun. Most people have a fixed mount where the panel faces the mid day sun. Max output for about three hours. No matter how bright the sun, your output will gradually go from zero output to max to zero again at the end of the day. You only get max output when the panel is directly facing the sun. Basically if your panel is on a fixed mount, you can expect about half the rated output if you average it out. 100 watts becomes 50 watts.  Take in clouds, smog, shadows and top to bottom angle and it reduces even more.  So in reality, a 100 watt 12v fixed mount panel peaks at about 5 1/2 amps but averages about 2 to 2 1/2 amps. At 2 amps average your looking at 70 to 80 hours to charge this 155 amp hour from dead to full charge if it is not in use. If it's being used then it will probably never get a full charge.
So in a nut shell figure 2 amps (not 5 amps ) output for every 100 watt panel. You also need to deduct any power used during the day. Say you watch tv all day. Tv draws lets say one amp when plugged into 120v socket.  That one amp turns into ten amps from your battery. On an eight hour daylight charge you need 1000 watts of panels to fully charge one battery plus another 500 watts to compensate for watching tv for 8 hrs during the day. That will leave the battery at close to full charge for your night time enjoyment..  tv, lights etc.  This is a little bit of over kill during the summer hours but in the winter when you really need it, this is what you want. Mount your Panels on a pole at a 45 degree angle ( vertical pipe, 45 degree fitting and another pipe into that ) and turn it by hand three times a day toward sun ( morning.. noon.. evening.. and back to morning ) and you can double your panel output from just being a fixed mount..  4 amps output average instead of 2 amps output per 100 watts average.

For you people who want to contest every post around, please don't unless I'm way off.  this is an average, not a scientific notation to the umteenth power..  I have Panels and batteries and wind turbines and gen sets.  I live totally off grid. I'm a retired Chief Engineer
2085333
I like this battery , since a loooong time and still charging up to 3 hours. just make sure you charge it first time at least 12 hours, and run battery maintenance at least once a month
2066453
Quite a good battery. No complaints works well and seems to be holding charge like new. I have been using it for a few months and no change with how it performs. Be sure to do a full discharge recharge cycle before going back to regular charging habits.
1816789
This battery worked great in my Toshiba laptop. I was impressed with battery run time. I have recharged multiple times, with each session last almost five hours. My experience with other compatables has been less than acceptable, usually less than two hours of run time. So I'm extremly happy with this purchase.
1096038
Great replacement battery ... easy to install.
1544657
Very good battery.  Just make sure to follow the directions in order to get a long lasting life out of it.
2207460
Once you own one, you will not go back to those lesser batteries.  Always worth the few extra bucks. Last one I had lasted me 11 years.  Keep in mind this particular  battery is taller then your standard battery.
2742221
Great battery, just don't drop it. It flew open and luckily I found all the bits and was able to snap it back together. Can't have too many of these and the flashlight was handy to say the least.
803580
cant go wrong with a battery that will recharge three phones before it needs a charge
1623274
I love these, I've bought several for the wife and friends.  Seems to hold a charge for a long time.  I doubt they're very powerful, I haven't tested it, but I think it should do the job in a pinch.
4701175
So far so good. They are on the large size, but make an excellent back up battery....peace of mind. I would recommend this battery!
908215
Work well..looking at getting a few more spares
3407126
good battery, maintains charge as advertised.
2419219
I bought an external charguer and this battery... becouse my micro usb port got broken...

Instead of paying to someone to repair it, i bought this battery...

Last like a day, with a lot of use, i use my 9100 like mp3 for my car... and i see some youtube videos too...

very good battery... 5 stars!!!
643703
Great Battery.. keeps a good long charge when shooting pictures or video. I'm a wedding videographer and we recently switched from Shooting from Canon's A1's to shooting all 5D Video. Might sound crazy but its awesome! I can usually shoot video all day with only two of these battery's with no need to recharge. Every once in a while I'll need to use the recharged one, but usually I'm good with just two cycles.

Oh.. and there are a lot of bad reviews on these  batteries because Amazon used to charge a way to much for these batteries, but the price has come down now and they are a great deal!
3456538
Five star...batteries hold a charge for a long time.  Through the old one away(recycle).
2995288
Best battery I have used, and I have used at least the original + 3 others. This one holds a charge longer and stronger than all others I have used.