Please read the description carefully.

Shipping to Lower 48 USA states via Fedex Ground ONLY. No international shipping including Hawaii, Guam, Puerto Rico. Non-USA customers click here.

Amazing 750Wh eBike Battery! Our EB4 36v 21Ah eBike Battery has a 750Wh capacity, containing x80 18650 lithium-ion cells. Great for eBikes, on-the-go power storage, building Powerwalls, or for powering any other 36v devices requiring up to 21A. For higher amp applications, combine multiple packs in parallel (adapt the connectors to combine multiples using 3x Amp Booster or 12x Amp Booster). Connect x2 of these batteries in series to make 72v 21Ah 1512Wh. Connect x2 of these batteries in parallel to make 36v 42Ah 1512Wh.

The EB4 is equipped with a Battery Management System (BMS) that protects the battery cells. Pack is shipped with the BMS already awake. Storage box not included.

** NOTE: To get an accurate shipping price when buying more than x2 packs, email support@jag35.com

Battery Specs

• Cell Chemistry:  LiCoO2
• Nominal Voltage:  36 V
  
• Nominal Capacity:  21Ah
• Length:  16.5"
  
• Width:  4"
  
• Height:  4"

Pack modules contain blue EVE ICR18650 3.7v 2.55Ah cells or purple LGGBM26 3.7v 2.55Ah cells, some packs may contain another cell brand and color.
 

Charging

2A charger sold separately HERE. Can also be charged with a fast charger (with an XT90 connector). To wake up sleeping packs, charge via the XT30 on the PCB board past 30v to wake up the BMSs. Make sure you fully charge the pack as soon as you receive it and before using it.

Expansion Battery (EcoFlow, Bluetti, etc):

This battery pack can serve as an expansion battery for:

• EcoFlow Delta Max 2000 (Solar Charging Input 800W Max, 11-100V, 13A). May require an XT90 connector adapter.
• EcoFlow Delta Max 1600 (Solar Charging Input 800W Max, 11-100V, 13A). May require an XT90 connector adapter.
• EcoFlow Delta Pro (Solar Charging Input 1600W Max, 11-150V, 15A Max). May require an XT90 connector adapter.
• EcoFlow Delta Mini (Solar Charge Input 300W 11–75V DC 10A max). May require an XT60 connector adapter.
• Bluetti AC300 (Solar Input 2,400W Max., VOC 12-150VDC, 12A). May require an XT60 connector adapter.
• Bluetti AC200 Max (Solar Input 900W Max., VOC 10-145VDC, 15A). May require an XT60 connector adapter.
• Bluetti AC200P (Solar Input 700W Max., VOC 35-150V, 12A). May require an XT60 connector adapter.
• Bluetti EB240 (PV Max Input Power MAX 500W/10A, OCV 16V~68V /MAX10A). May require an XT60 connector adapter.
• Similar spec portable power stations.

** NOTE: To get an accurate shipping price when buying more than x2 packs, email support@jag35.com

Product video + usage recommendation:

If your pack falls asleep, these videos show you how to wake it up: 

To wake up sleeping packs, charge via the XT30 on the PCB board past 30v to wake up the BMSs.  Or see these videos:

If the BMS of one the 20-cell packs falls asleep, follow these steps:

Awakened battery packs have blinking blue LED lights on the top edge, near the XT30 connector. If your packs have modules with no blinking blue light, that pack's BMS needs to be awakened.

There are several ways to wake the BMSs. The easiest way to wake up the BMS of sleeping packs is to charge all the packs via the XT30 on the PCB board, once the state of charge is past 30v the BMS should wake up when you unplug the charger.

If an individual pack BMS is asleep, but others are awake, then you can do the same as above, or you can disconnect the sleepnig 20-cell pack from the PCB and directly apply voltage to the small JST PH 2.0mm 4-pin connector, and after it charges past 30v the pack BMS will wake up after you disconnect the charger (the BMS LED light will turn from blinking slow red to blinking blue). Then plug it back into the PCB board.

See below for more instructions on waking up the pack's BMS. Obviously, the packs will not wake without charge. Charge these packs using the NEW 42V 1.7A BATTERY CHARGER + MU CABLE BY XIAOMI or this variable charger.

Individual Battery Pack Module LED Indicator Lights

• Blinking blue = BMS awake
• Blinking red slowly = Battery charging
• Blinking red and blue = Battery trickle-charging
• No blinking light = Battery BMS asleep, needs waking
  
• Blinking red fast = Potential BMS or cell problem

Charger LED Indicator Lights

• Solid red = Charging
• Blinking red = Trickle charging
• Green = Fully charged / Not charging
  
  

When the charger is plugged into your battery pack you should see the charger's LED indicator light turn solid red and the battery pack's LED indicator light blinking red slowly. If you see the charger's LED indicator light blinking red (trickle charging) and the battery pack's LED indicator light blinking red & blue, leave your battery pack charging for an extended period of time until the charger's LED indicator light turns solid red. See videos above for additional steps.

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These items are sold for DIY and Second Life purposes. Listings that are “untested” as sold as-is and cannot be returned, exchanged or refunded. Even when sold as “new”, “NOS”, or “like-new”, they may be in less than perfect condition.

If you buy a product from us and then realize you don't have, or don't want to acquire, the tool(s) or information needed to make our product(s) work for your specific build, this does not constitute valid grounds for replacements, exchanges or refunds. You are responsible for doing your due diligence before making any purchases.