At EMP, we specialize in building custom lithium-ion battery packs for high-drain applications such as e-bikes, scooters, solar storage, drones, LEVs, and industrial equipment. Unlike mass-produced imports, every EMP pack is engineered to order in the USA — meaning you get the freshest cells, carefully tested, balanced, and configured to meet your unique needs.

Here’s how the process works:

1. Define Your Battery Needs

We start by asking three key questions:

• 
  How long do you need the battery to last (capacity in Ah)?
  
• 
  What are your maximum size or dimension limits for the pack?
  
• 
  What is the maximum power (watts/amps) you need the battery to deliver?
  

This ensures we match your performance expectations with the right build.

2. Choose Premium 21700 Cells

We use only trusted high-drain cells such as:

• 
  Samsung 50S – affordable, balanced, and proven reliable.
  
• 
  Molicel P50B – ultra-high performance with excellent cycle life.
  
• 
  (Coming soon) Molicel M65A – next-generation high-capacity cell option.
  

These cells are paired with nickel-copper tab structures for maximum current handling.

3. BMS Integration & Safety

Every pack is protected by a Deligreen/Daly BMS system, configured for your pack’s voltage and current. This ensures balanced charging, over-discharge protection, and reliable operation. All packs are wrapped in flame-retardant fish paper insulation and shrink-wrapped for durability and safety.

4. Custom Fit & Design

We design the pack using staggered 21700 cell holders, ensuring a compact and efficient layout. Depending on your needs, we can configure from 3P up to 10P builds in voltages from 36V to 84V. Sizes are tailored to your space constraints and power demands.

5. Build, Test, and Ship

Once designed, your pack is assembled by our technicians, tested for voltage balance, internal resistance, and safety, then prepared for shipping. Nothing sits on a shelf — you receive a freshly built battery direct from our shop.