EM3ev 52V (14S6P) Hard-Case Triangle Ebike Battery Pack With Bag

From: $569.00 (USD)

The Original, EM3ev Triangle Pack


50V (14S6P) Small Triangle Hardcase Battery Pack With Smart BMS Options

50V (14S) Triangle Battery

Grin Satiator Including New Version (AKA ST3) Adaptor (48V Version, Contact us if you require 72V)

Grin Satiator, Universal Battery Charger

58.8V Charger (for 14S, 50/52V Battery)

58.8V Charger Type

Charge Adapter

Charge Adapter for Customer not purchasing a Charger

Discharge Connector

Discharge Connector for Customer Purchasing a Battery without a Charger.

AC Plug for Charger

AC Plug for Charger

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EM3ev 52V (14S6P) Hard-Case Triangle Ebike Battery Pack With Bag

We now have a new hard-case version of the 14s6p triangle battery pack with Smart BMS and power switch. The Smart BMS allows the cell group voltage, temperature and battery capacity percentage to be monitored via an Android app through a Bluetooth connection. The Smart BMS will balance the cells even at a 90% charge.

See the image for the hard-case dimensions. The battery includes the triangle bag. Please add 1.5cm to 2cm on each face to allow for the triangle bag’s padding.

EM3ev were 1 of the originators of the Triangle battery for Ebikes. We’ve been building triangle packs for at least 5 years and during that time, we have learnt a thing or 2, about not only triangle battery packs, but battery pack construction in general. We build our Triangle Packs using Samsung and LG Chem cells. Details of the performance to expect and our recommendations are detailed in the table further down this listing.

Combined with our custom EM3ev triangle bags, even a small frame, possibly even a full suspension frame, can accommodate our compact triangle pack within the triangle of the frame. The battery weight (spec. dependent, approx. 4.2-4.5kg) when located within the frame triangle, is barely noticed. So, if you need compact size and high power, the 25R or 30Q are the best choices. If you also want to have the highest possible capacity, combined with high power, the 30Q pack is the best choice. We offer various chargers as optional extras. Our EM3ev triangle bag is included at no additional cost.

EM3ev 52V (14S6P) Hard-Case Triangle Ebike Battery Pack Cell Specs

We offer various Samsung, Panasonic and LG cell types, in addition to the standard ICR18650-22 (NCM cell, 3C rated, approximately 2.1Ah) cell. These new cell types are the High Energy INR18650-33G (NCA Cell, 3C Max rated cell, with approx. 3.1Ah nominal Capacity) Panasonic PF (NCA 2C recommended Max, 3C Max burst current ~2.85Ah), Panasonic GA (NCA, 3C Max, ~3.4Ah) and LG MJ1 (NCA, 3C Max, ~3.40Ah). There is also the High Power cells, the INR18650-25R and INR18650-30Q. These are NCA type cells, ~8C rated with Capacity of approximately 2.45Ah (25R) and ~5C rated and capacity of 2.95Ah for the 30Q cell.

Regardless of the cell type used, the dimensions of the pack are unchanged.

Specification for Each Variant of the EM3ev 52V (14S6P) Hard-Case Triangle Ebike Battery Pack:

Cell Type Capacity (Ah) Capacity (Whrs) Max Cont. Current Max Burst Current Weight
Standard-22P 50.4V 12.6Ah 635Whrs ~25A ~38A 4.2kg
High Energy-PF 50.4V 17.1Ah 862Whrs ~34A ~51A 4.5kg
High Energy-33G 50.4V 18.6Ah 937Whrs ~28A ~37A 4.5kg
High Power-25R 50.4V 14.7Ah 741Whrs ~40A ~55A 5kg
High Power-30Q 50.4V 17.7Ah 892Whrs ~40A ~55A 5.2kg
High Power-MJ1 50.4V 20.4Ah 1028Whrs ~31A ~41A 5.2kg
High Energy-35E 50.4V 20.4Ah 1028Whrs ~31A ~41A 5.2kg
High Energy-GA 50.4V 20.4Ah 1028Whrs ~31A ~41A 5.2kg


Please note we recommend a max of no more than 50A for the Smart BMS. The trip current is set just above 60A. 

Our Small Triangle Pack (14S6P) uses a robust and reliable 14S 40A Li Ion type BMS. A pre-charge, as with all our packs, is fitted as standard (XT90-S). This is a must have feature with these High Discharge Battery Packs in our experience. A pre-charge will help to avoid issues with connectors and the electronic components in the battery and motor controller. The cells within the pack are bonded together using a special RTV. This RTV offers high insulation resistance, it is flexible, but also very strong. All signal cables are terminated via a PPTC (thermal fuse), to protect against a short. Even a dead short on the BMS Signal wires will not cause a hazardous situation

Please note that when a battery is ordered with a kit, we will make the controller to battery connections plug and play including Pre-Charge. We will supply a matching tail. This should be linked to your existing controller supply.

EM3ev 52V (14S6P) Hard-Case Triangle Ebike Battery Pack With Bag Features:

  • Tightly packed triangle layout, with lots of protection to avoid damage. Heavy Duty Rubberised Heat-Shrink provides a tough and durable finish.
  • We use 14S (50.4V, based on 14*3.6V), not 13S (46.8V nominal, based on 13* 3.6V), so that means a working voltage of over 48V most of the time and it also means that you’re getting that much more capacity than you would have had with an equivalent 13S Pack (7.7% additional capacity versus a 13S equivalent).
  • Every cell in the pack is fused (just like almost all of the batteries we supply). We have been designing and manufacturing (in-house) our own battery terminations for several years already. Cell level fusing, means that in the event of an internal short circuit in the battery (which the BMS cannot protect against), then all that will happen is that some sacrificial links will safely open, preventing any of the cells or cabling from overheating and becoming dangerous. CNC spot welding ensures consistent weld quality and weld position. Safe by design!

EM3ev 52V (14S6P) Hard-Case Triangle Ebike Battery Pack With Bag Specification:

  • Nominal Voltage of 50.4V, assuming 3.6V nominal cell voltage. NCM/NCA cells are not 3.7V nominal as some seem to think and claim.
  • Cycle Life estimated at 500-700 cycles (to 80% Retained) with 100% Charge and 100% discharge cycles. Cycle life is extended (possibly doubled) by charging to 90% and limiting discharge to 90%. We make it easy to control the Charge voltage with our switching charger. To accurately limit the discharge, the Cycle Analyst is a great tool. Using continuous High Discharge Rates, higher than the recommended levels, will cause cell heating and can shorten cycle life.
  • Charge Voltage of 58.8V for 100% charge, 57.4V for 90% Charge (our 58.8V 5A NCM charger include a switch to charge to 100% and 90%). The Satiator charger allows charging to any SOC. Our small 58.8V 2A charger are very reliable and cost effective, but be aware that charging takes longer with just a 2A charge rate.
  • Dimensions: ~81mm thick 331m long, 214mm high (detailed dimensions shown in additional images). Please add 1.5cm to 2cm on each face to allow for the triangle bag’s padding.

Lead-Times For Battery Pack

If we don’t have the battery pack already built in stock, the lead time is approx. 5 to 7 working days for us to build one once the order has been placed. We have streamlined our building process and the lead time is now 3 to 4 working days.


2 reviews for EM3ev 52V (14S6P) Hard-Case Triangle Ebike Battery Pack With Bag

  1. 5 out of 5

    oscholta (verified owner)

    I bought a New BBSHD and installed it on my Fat bike. Everything went as planned and the internet made it easy. When it came time to order a battery, I agonized over what to buy. I researched every possibility of type, model and price. I decided to got with the PF small triangle pack. I received it and I could not be more pleased. Everything from the bag, to the new hard case, and the bluetooth app that comes with it. I am very happy with my purchase and know now I made the right choice.

  2. 5 out of 5

    bigkahuna53 (verified owner)

    I converted a Surly Wednesday into an fat ebike… This battery just barely fits into the “Small” size frame with the included bag… With some customized programming to my Luna Ludicrous BBSHD, I’m now getting 80+ miles on a rolling hills/pavement with a 90% charge… Couldn’t be happier with the customer service and this battery!

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