Current Top Sellers
Key Specifications: (click here for more info on what these stats mean)
- 14s4p = 56 Genuine Panasonic 18650 cells (see breakdown on 18650 cells)
- 52 volts
- 11.5ah or 14ah depending on cell choice
- 600 or 700 watt hours
- 30 amp output
- Only 7.5 pounds
- Life Expectancy 500-1000 charges
- Dimensions: 15.5 x 3.5 inches (just battery) 17.5 x 4.25 inches with mount
- Made up of some of the finest battery cells in the industry (Panasonic Pf or Panasonic GA)
- Amazing power density in small size pack
- Enough power for most kits
- On/off Switch
- Battery meter tells you how much charge is left
- Battery locks into place with key lock
- Battery is easily removable and swappable
- Aluminum Case to protect battery
This isn't your ordinary Chinese made bottle pack. True, we started with the highest quality Chinese bottle case on the market, and then filled it full with 56 of the highest quality 18650 cells available. You can choose either the Panasonic PF for high power or the Panasonic GA . These are the same 2 cells that Tesla chose for most of their battery packs.
This pack is built into a bottle shape bottle, designed to fit where the water bottle would go for an ultra clean installation inside your triangle. This will give your bike an expensive commercial ebike look to it. The bracket easily mounts to your frame either with existing water bottle holes or you can simply drill some. Threaded holes or use zip ties. Your pack slides in and out of the bracket with a quick release so you can charge your battery on the bike or off the bike. It also has a key switch for locking the pack to the bike so you don't have to worry about theft. It also has an on-off switch which is nice on an electric bike.
Look at this article for example of how elegant a mounting solution a bottle pack like this can be. (read article here)
If you kit or controller puts out 30amps we really recommend you go with the PF cell. The GA pack should just be for users who desire more range.
This pack comes with a very advanced BMS (battery management system) which protects the pack from damage during charge and discharge. This BMS also has temperature protection to keep the pack from getting too hot during discharge and charging. (read our article on BMS)
Regarding mounting / Compatibility
This is a long pack (15 inches), and will fit on most hard tail frames, as long as they are not small in size on the standard downtube position using the regular water bottle mount screw holes. (see pictures for example) For smaller sized packs look at our 48 volt bottle packs, and our shark packs both in 48 and 52 volts.
This bottle battery may be too long for some bikes so may need to be mounted in a different place like on the toptube or even on a rear rack. You can zip tie the mounting bracket to the bike in any position, or you can tap screw holes for the ultimate solution if you cannot use or do not have water bottle mounting screw holes.
This is a 30amp continuous amp pack with 60amp bursts which should be compatible with just about any ebike kit. Do not worry if its more amperage than you need because your controller will only sip the amps it needs. However make sure your controller is compatible with a 52 volt battery. Most 48 volt ebike controllers will work with slightly higher 52 volt pack and you will get up to 20 percent more power out of the same amperage (watts is equal to volts times amperage). Read our article on the benefit of 52 volts
Go with the panasonic PF 11.5 ah cells if you need 30A continuous only choose the Panasonic GA 14ah if you desire more range.
Installation and basic info
1. My battery pack stopped charging, what should I do?
2. My battery is reading (any #) volts, how much life is left before I need to recharge?
3. How can I increase my range without replacing my battery?
4. How long should i leave the pack plugged in?
5.How do i know when it is fully charged?
6.Are there things I can do to best care for the battery and prolong its life?
7. Why does my charger have a different voltage than the battery listed on the label?
1. Often if this happens it is due to the anti-spark feature built into the BMS. Say you did not properly make a connection somewhere and the wires sparked, the BMS would shut itself down to prevent damage to the system. If this happens the first thing you always want to do is to try resetting the BMS by using your charger to try charging through the discharge connector for a few seconds, maybe a minute. You just run a jumper (basically regular wires) from the charger's connector to the battery's discharge contact, making sure you go positive>positive and negative>negative. At Luna we call this jump starting it, instructions can be found here: https://lunacycle.com/jumping-your-lu...-battery-pack
2. This is a 52v nominal pack. As seen in the chart below this pack is full at ~58V and empty at ~45V. For long battery life try to keep voltage at least between 56.7-46.3V (A charge percentage of between 90%-10%)
3. Here is an article that offers some good advise for increasing range. You can find it here
4. Well you should leave it plugged in until it is charged or maybe a little bit before it is fully charged, optimally you want it to be within a range of voltage/charge percentage equaling something like 80 to 90%, perhaps a bit lower if storing for a long time such as over the winter. This will optimize it for the longest amount of cycle life. You can still charge to 100% right before a ride though as this does not negatively affect the cells much, it is more about not leaving the cell at 100% for a long period of time than about never letting it reach that charge level.
5. If your battery has a voltage display on it then you can tell that is fully charged based on the voltage readout, we have charts on every listing for each type of battery pack showing what voltage equals what the charge percentage. You can also test the voltage with a multimeter directly from the discharge connector.
6. You can best care for the battery by not running it all the way down to zero, for the best care of it you really want to keep it above 20%. This is where having a large capacity battery is great because you will not be putting it through such a high depth of discharge, thus increasing its cycle life. Another way of caring for the battery is to make sure you use the right type of cell for your application, and if you are using a cell not designed for high amps, try not to pull too much amps from it. So if you are for example using an NCRB pack designed for range, if you want max cycle life maybe don't use it for a high performance application that would be better suited for a cell like GA or 30Q.
7. The voltage listed on your battery is just the nominal voltage, it actually goes higher and lower depending on the charge. The charger outputs at the highest voltage that the battery would reach when fully charged. See the chart on the listing for your particular battery and look at the 100% voltage level, that is about the voltage it should be charging at.
52V instead of 48V - Problems!
Posted by Wes Sims on May 25th 2017
Based on recommendations in your learning about batteries page I ordered the 52V Panasonic Bottle battery for my TSDZ2 48V motor. The motor would not work. After over a week of trying to negotiate a replacement battery I found information on the internet (endlesssphere forums) that the TSDZ2 would not work with a fully charged 52V battery. It apparently has a "high voltage cutout" above 54V. As I did a full charge on the first charge I now have a battery - motor combo that I can't get to work.
Tribal wisdom on the internet is that if I can get the 52V battery below 54 volts and then only recharge to 90% or less it would work. Don't know how I can do that as I can't get the motor to run to discharge the battery.
Also, the battery and mount arrived with one the key in the switch bent 90 degrees and it broke when I tried to straighten it. The second key is also bent slightly, and I have not found any locksmith that has a matching blank.
Elegant, functional -- watch the length (and power)
Posted by James N on Aug 2nd 2016
The battery looks good, the mounting system worked great (though I needed to very slightly extend the mounting holes to fit my bike), and I like being able to easily remove the battery (but only with the key!) to store/charge it without having to disconnect any wire. I've been commuting ~22 miles every day for a week with it, and it has remained mounted rock solid onto my water bottle mount points.
- It is QUITE long. I could only BARELY fit it into my standard mountain bike's triangle (and had to drill the mount holes a little bit longer to accomodate). Make sure you measure before ordering!
- The output wire leads were perplexingly hidden inside -- I had to take off both rear panels to find them and pull them out where they could be used (not a big deal, just a heads up). Be careful not to strip the cheap screws.
- This is entirely due to my own beginner ignorance, but the 4p NCRb cells in the option I picked are really quite insufficient to power my 1500w leafbikes DD hub motor sufficiently, since they only provide 20A continuous (and even that somewhat begrudgingly). Again, my own fault -- they would be great for other configurations that need less current (and the product description does warn about this possibility)
5 stars for performing solidly exactly as advertised.
Great Looking and Works Well, So Far
Posted by Unknown on Jul 10th 2016
Suppliers and manufacturers often ask for reviews right after you have bought a product. This doesn't give the buyer a chance to use the product, much less know how it will perform over time, which is one of the most important attributes of any product. So I have used this battery for two short rides on my new e-bike. It worked perfectly and did not warm up even slightly when I climbed a 15% grade without pedaling. I like the appearance of this battery, which is the reason I chose it over other batteries (which otherwise had similar specifications). The mounting bracket is sturdy and has enough material in it to customize the way it is attached, if you need to do that. That's about all I can tell you so far.