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Battery Systems, Replacement Batteries, Battery Accessories, Chargers

Batteries are the key component of any electric vehicle or bicycle. Battery purchase and replacement constitutes almost 100% of your operating cost. The cost of electricity to charge them is insignificant in comparison. So, choosing the right battery is the most important decision you will make.

At EcoSpeed we try to take an agnostic attitude towards batteries. Most e-bike, scooter, and electric vehicle manufacturers try to lock you in to their battery solution. That means when it comes time to replace your battery pack, you have no choice but to pay them whatever they're asking for whatever they have. We don't do that. Battery technology is advancing rapidly today, so we want to make sure our customers can always take advantage of the latest technology. Or, take advantage of the lowest cost one. The important thing is that you get to choose.

Below are the battery options we offer. If you want to choose a battery from somewhere else, or even put together your own, we will support you in doing that. Ours are not the cheapest, but we do give you a complete integrated solution with everything you need using high quality batteries. The lowest cost packs are often just a bunch of cells taped together with wires hanging out.

Complete Battery Systems
These include everything you need to power up your Electric Mid-Drive unit: battery, battery case, fuse, power switch, mount to attach the battery to your bike, and all wiring. With one of these batteries, an EMD, and the proper frame adapter for your bike, you have a complete system.
Lead-Acid, Powersonic 10Ah, 36V
High quality starved electrolyte Powersonic lead acid batteries save on cost. Useable energy is about 290 Wh. Not recommended for use with the Powerpack Motor. Packaged in a Topeak MTX style case that fits into a track on top of a special pannier rack. The case also features extra storage space for locks or other small items. Case dimensions: 12.5"L x 6.5"W x 7.5"H (320mm x 165mm x 190mm). Weight with case: about 23 lbs (10.5 kg). Includes case, MTX pannier rack, fuse, switch box, 1.2 Amp charger.
BS-36SL10$395
Lithium Iron Phosphate, 10Ah, 38V
Lithium Iron Phosphate (LiFePO4) is the newest member of the lithium battery family. It features an extremely long life span -- 4 to 10 years in normal use and can be rapid charged in as little as 20 minutes for some types. Lithium iron phosphate batteries have an extremely flat discharge voltage curve, so they can supply full power right up to the end. Also, they are much more tolerant of deep cycling than other lithium chemistries so a LiFePO4 battery can often take the place of a larger lithium ion polymer or other lithium battery. These are high capacity LiFePO4 batteries that pack more energy into a given weight than most. As such, they should be limited to a maximum discharge current of 3C (3 x Capacity or 30 Amps for the 10Ah size). Note that this means that the Powerpack motor should not be used with this size. Also, rapid charging should be limited to 1C, or 10A. Useable energy is about 375 Wh. Weight: about 10 lbs (4.5 kg), Dimensions: 14.8" L x 3.6" W x 3.6" H (375mm x 90mm x 90mm). Includes 2A cell balancing charger, port for fast charger, case with carrying handle, fuse, power switch. Choice of mounting systems. Contact us if you're not sure which one you need.

BS-38LF10-0   Includes tie down straps only.$995
BS-38LF10-1   Cradle with bolt on mount for rear pannier racks with solid top decks.$1045
BS-38LF10-2   Cradle with clamp on mount for rear pannier racks with open top decks.$1045
BS-38LF10-3   Cradle with clamp on mount for Bike E frames.$1095
Lithium Iron Phosphate, 15Ah, 38V
A new second generation Lithium Iron Phosphate (LiFePO4) in a mid-range 15Ah size. Useable energy is about 575 Wh. This new battery features a replaceable cell balancing BMS and exceptionally light weight, 4 lbs less than our previous 15Ah. Weight: about 11 lbs (5 kg), Dimensions: TBD. Includes 2A bulk charger, case with carrying handle, fuse, power switch. Choice of mounting systems. Contact us if you're not sure which one you need.

BS-38LF15-0   Includes tie down straps only.$1395
BS-38LF15-1   Cradle with bolt on mount for rear pannier racks with solid top decks.$1445
BS-38LF15-2   Cradle with clamp on mount for rear pannier racks with open top decks.$1445
BS-38LF15-3   Cradle with clamp on mount for Bike E frames.$1495
Lithium Iron Phosphate, 20Ah, 38V
Second generation Lithium Iron Phosphate (LiFePO4) in a larger 20Ah size. Useable energy is about 750 Wh. Weight: about 17 lbs (7.7 kg), Dimensions: 13.9" L x 7.3" W x 4.2"H (352mm x 185mm x 105mm). Includes 2A bulk charger, case with carrying handle, fuse, power switch. Choice of mounting systems. Contact us if you're not sure which one you need.

BS-38LF20-0   Includes tie down straps only.$1845
BS-38LF20-1   Cradle with bolt on mount for rear pannier racks with solid top decks.$1895
BS-38LF20-2   Cradle with clamp on mount for rear pannier racks with open top decks.$1895
BS-38LF20-3   Cradle with clamp on mount for Bike E frames.$1945


Do It Yourself Battery System Accessories
If you have a modest amount of electrical and mechanical skills, you can put together your own battery system and save yourself some money. The easiest solution is to wire together some generic lead-acid batteries which are available everywhere and purchase an SLA charger off the web. You can also purchase lithium batteries and chargers from other suppliers. Whatever you choose to do, we will support you with technical advice, mounting pieces, and the proper connectors and wiring.
SLA Wiring Kit
Includes all the wires and connectors you'll need to build your own 36V lead-acid battery system from 3 12V SLA batteries. Also includes a fuse and a switch box and and a charger port with 2-pin inline connector.

BSA-SLA$139
Battery Adapter Kit
If you want to use a battery from somwhere else, you'll need a power switch with the proper connector for our motors. The supplies that. This kit also includes a 50 Amp power fuse and a pair of bare wires that you hook to your battery system.

BSA-UB$129
Topeak MTX Trunk Bag
One of the best ways we've found to carry batteries on a bike. These bags are made to slide into a special groove on top of a pannier rack. A quick release latch and heavy duty carrying handle make it easy to carry your battery indoors for charging. Depending on how many batteries you pack inside, you can have extra space for a lock, extra clothing, or even your charger. Comes in two sizes with or without foldable side pannier bags.

BSA-TB1430 cu in.$69
BSA-TB1P1030 cu in. w/pannier$89
BSA-TB2800 cu in.$89
BSA-TB1P1500 cu in. w/pannier$119
MTX Racks
Pannier racks designed to accept the Topeak MTX trunk bags. Can be adapted to fit most bikes.

BSA-MR1Explorer MTX Rack$49
BSA-MR1DExplorer MTX Rack, Disc Brake Compatible$89
Dual Parallel Battery Adapter
Wiring harness with two big Schottkey diodes allows two battery packs to be connected in parallel without any danger of one battery feeding current into the other, even if they are not the same battery type. Each diode can handle up to 2700 Watts per battery pack with less than 1.5 percent power loss at full power. Works with all of our battery systems and allows packs to be combined for greater range or flexibility.

ACC-DPBAT$129


Battery Chargers
The charger is included if you purchase one of our complete battery systems. Look here if you need a replacement charger or want a second charger to keep at the office.
Lithium Ion Polymer, 29.4V 4Amp
Charger for our earlier generation 26 Volt lithium ion polymer batteries. Anderson connector.

CHGR-29LP4$129
Lithium Ion Polymer, 42V 3Amp
Quality charger for all 37V lithium ion polymer batteries. Includes power on-off switch.

CHGR-42LP3$149
Lithium Iron Phosphate, 43V 2Amp, cell balancing feature.
High quality Lithium Iron Phosphate cell balancing charger.

CHGR-43LF2BAL$249
Lithium Iron Phosphate, 43V 2Amp standard bulk charger.
High quality Lithium Iron Phosphate charger for batteries with built in cell balancing electronics.

CHGR-43LF2$229
Sealed Lead Acid, 36V 2Amp
Quality charger for all 36V lead acid batteries. Made by Soneil of Canada.

CHGR-36SL2$119
Sealed Lead Acid, 36V 1.2Amp
Generic charger for 36V lead acid batteries.

CHGR-36SL1$59


Replacement Batteries
Rechargeable batteries wear out and must be replaced periodically. Odds are though, with advances in battery technology now proceeding at a rapid clip, you'll never replace your battery -- you'll just upgrade to something better.
Lithium Ion Polymer, 26V upgrade special.
Our earlier 26V lithium ion polymer batteries are no longer made. So, we're offering a special upgrade deal to our 26V lithium battery owners. Buy any new 38 volt lithium iron phosphate battery and charger and get a new BMC and controller motor for half price. If you have a Powerpack motor, it is 38V compatible already, so all you need is a new battery. For Powerpack motor owners, we'll throw in a charger for free.

Lithium Ion Polymer, 37V, 16Ah upgrade special.
We have discontinued carrying lithium ion batteries in favor of the much better lithium iron phosphate chemistry. Upgrade to a new 15Ah LiFePO4 system and get 25% off the regular price.

BS-38LF15-0UPG$1046
Lithium Ion Polymer, 37V, 24Ah upgrade special.
We have discontinued carrying lithium ion batteries in favor of the much better lithium iron phosphate chemistry. Upgrade to a new 20Ah LiFePO4 system and get 25% off the regular price.

BS-38LF20-0UPG$1384
Lithium Iron Phosphate, 10Ah
Includes fuse and connectors.

BR-3LF10$795
Lithium Iron Phosphate, 15Ah
Includes fuse and connectors.

BR-3LF15$1195
Lithium Iron Phosphate, 20Ah
Includes fuse and connectors.

BR-3LF20$1645
Sealed Lead Acid, Powersonic 12V, 10Ah
The 10Ah SLA pack is made up with 3 of these batteries. Individually replaceable.

BR-12SL10$75