STK BP-511a BP-511 2 Pack Battery for Canon Rebel BP511a Charger DS6041 Eos 1d 10 d 30d d30 20d 40 50 50d Eos5d Eos20d Powershot g3 g5 g6 Pro 1 BG E2N Grip ZR600 BP511 Cannon Accessories CB 5L CG 580

These batteries are awesome. SterlingTeK has a quality reputation for a reason. These last for twice as many shots than my original Canon batteries, with flash on and LCD at the highest setting. They are solid, sturdy and are of quality construction. The price is unbeatable and I would recommend them to my friends and family. The product is excellent, and the value is unbeatable. That being said, here is a small course on rechargeable batteries and how to get the most out of your batteries for all of your devices: ----------The rest of this review is more of a guide to rechargeable batteries---------- I recommend charging them fully as soon as you receive them (this is common for battery break-in procedure, as sometimes they discharge while on shelf and during shipping). Then after you've fully charged the battery, allow the battery to get to zero bars before charging the battery again, for proper battery conditioning / break in / calibration. HOWEVER, NEVER LET ANY BATTERY COMPLETELY DISCHARGE to the point of your device turning off! This is horrible for battery life. If you accidentally allow this to happen to any battery ALWAYS charge the battery IMMEDIATELY. This way you will extend the life of the battery. I have done many hours of research pouring through battery testing PDFs for all types and variations of batteries, for all kinds of devices. Yes, I know that many manufacturers claim that this is not necessary but I have found that ALL of MY batteries outlast those of my wifes and kids' devices where I had not had the chance to do this break-in for them. After this first battery calibration that I detailed above here is what I do, based on what I've found from extensive research: I always charge my batteries when they get low, but not dead. Between 10% and 20% remaining is the sweet spot, but 5% or 25% isn't going to make a whole lot of difference. Then, I charge the battery to about 80-90% percent, but not completely fully. Obviously not all chargers/devices show a percentage, so in those cases I just charge to 100% and take the battery off the charger as soon as I see that it is done. I NEVER charge batteries overnight or unattended. If you do, you will notice that you batteries will not last very long and will eventually not hold a charge much sooner than you would expect. With this method you will extend the life of your batteries of all kinds (obviously I'm only referring to all kinds of -rechargeables-). However it most be noted that once every six months, or 10 charge cycles, I repeat the original battery-break in that I detailed in the beginning. This re-calibrates the battery and in a way, REMINDS it of its limits. Again, I know a lot of manufacturers claim "our batteries do not have a memory". I disagree as my personal experience proves otherwise. Obviously, your mileage may vary. I can't stress enough, that completely discharging any type of rechargeable battery to the point of it being dead; will literally reduce the life of the battery drastically UNLESS it is immediately charged, no matter what brand or type, or style they are. One last thing: I only charge my batteries with the device off, as the heat from charging and using the device is extreme. (ever try to charge your cell phone and play a game on it at the same time? Big no-no). Further, Try to charge your batteries in a cool environment around 50 degrees fahrenheit OR put a small fan in front of them while charging. As most people know, HEAT destroys batteries, and charging them makes them heat up considerably. The less you allow your battery to reach temperatures that are too hot/exceedingly warm, the longer they will last. The same goes for allowing your battery to die. The less you allow your batteries to die completely to the point of your device turning off, the longer they will last. I hope this has helped, I spent quite a bit of time writing this... so if it has, please click the helpful button so it will be seen by more people.

Works perfectly with my camera, no issues at all

If you're expecting Canon performance go spend 2-3 times the money on the Canon batteries. But I just did a wedding with these beauties and they are amazing. They charge up quick and seem to hold their charge rather well. Having just shot a wedding and bringing these along was brilliant. They last about 75% as long as the canon battery I use, however, for the price you can't beat it. I have only owned them for a couple weeks now, but they continue to impress me. We will see if other reviewers were more accurate and they die after a few months of use. But so far so good. Even if 1 of the batteries die it's still a great deal. I would caution against using these as your only option, strictly based on other reviewers problems and the fact that they aren't OFFICIAL canon batteries. With the wedding I did, I carried 2 spare canon batteries just in case, but only needed to use 1 of them because of these.

Works great!

Bought these to replace exhausted OEM batteries. The price of two of these batteries is well worth the low price over the OEM batteries if they are even available. They charged up easily and seem to hold charge for considerable time with moderate use and even through longer periods of storage. They also come with plastic covers to protect the terminals and covers saved from the OEM are perfect fit as well. The charge is just as good as the OEM.

Works great

The battery held its charge on a 2 week using it daily. Very impressive.

I purchased two of these batteries for use with my Canon 20d for a vacation because I didn't want to be disappointed by an old battery. I was skeptical but my worries were unfounded. I am glad I did not listen to the negative reviews here. These batteries grossly out performed my original canon batteries I've used for years. The originals had never let me down, but the new batteries were great. We traveled for 10 days straight and I was concerned that I would not have recharge points. With all 4 (2 new, 2 old) charged when I left, I shot close to 1200 pluss photos before I saw a dip in the power meter. I still shot pics for another complete day before the meter dropped to a concerning point. I always had a backup available, but pushed the limit. Final count was 5 days and 1350 photos. I switched it out with the second battery and shot another 1300 photos over the next 5 days with no sign of drop off in power. At each stop I would shoot 3 to 25 photos, generally day use, no or limited flash. I would not hesitate to purchase these again or recommend them. If your second guessing the decision, don't. Other reviews called this a no brainier, and it is. The price is low compared to the OEM battery and way out performs it.

This is a great replacement for oem battery. I bought 2 for mr recent 10 days trip to MP. never had to reach out for the second as first one carried on thru out the days heavy use

Work really well Held the charge for a whole wedding

Much cheaper than Canon's OEM batteries, good finish - not cheap looking like many others - feels good in the hand. Lasts long. One thing I missed was Canons color coding method for charged/depleted batteries.

These batteries last a lot longer than my old OEM 511A's, although that is what I expected since they are 2200mAh. Shipping took a bit longer than I would have liked, but they did show up within the very large estimated arrival window.

As good as original and may be even better.