Everyone talks about batteries. Very few people talk about cells — the individual units that actually make up your battery pack. And that distinction matters more than you think.
When a seller in Lahore or Karachi tells you "this is a 72V 40Ah lithium battery," they're telling you the output specification. What they're not telling you is: what cells are inside? What form factor? What brand? What grade? Are they genuine or rewrapped? How many spot welds hold the pack together? What kind of nickel strips connect them?
These are the details that determine whether your pack lasts 5 years or 5 months. As we covered in our battery chemistry guide, LiFePO4 is our recommended chemistry for Pakistan. But within LiFePO4 — and within every other chemistry — the cell form factor, brand, and grade make a massive difference.
At MZEV, we tell you exactly what's inside every pack we build. This guide will teach you why that transparency matters and how to evaluate what you're actually buying.
Lithium cells come in several physical shapes. Each has trade-offs in capacity, assembly complexity, cost, and durability. Here's every form factor you'll encounter in the Pakistani EV market:
Dimensions: 18mm diameter × 65mm long — picture a slightly chubby AA battery. This is the cell that started the lithium revolution. Tesla's Model S and Model X used thousands of these cells in their packs. Your laptop probably runs on 18650s. They're literally everywhere.
Popular models you'll see in Pakistan:
Typical capacity: 2500–3500mAh per cell. That means to build a 72V 40Ah pack, you need a LOT of these — we're talking 200+ cells spot-welded together with nickel strips.
Pros: Cheapest per cell, most widely available globally, decades of proven technology, easy to replace individual failed cells, massive selection of brands and specs.
Cons: Low capacity per cell means you need many more cells for a given pack size. More cells = more spot welds = more potential failure points. A 72V/40Ah pack needs 240+ cells (20S12P in NMC). Assembly is labor-intensive and quality-dependent.
Dimensions: 21mm diameter × 70mm long — the bigger brother of the 18650. Tesla switched to 21700 cells for the Model 3 and Model Y, and the entire industry followed. There's a reason: the 21700 hits a sweet spot of capacity, power, and manufacturability that the 18650 can't match.
Popular models:
Typical capacity: 4000–5000mAh per cell — roughly 50% more than an 18650. That means fewer cells needed for the same pack capacity, fewer welds, fewer connections, and a more robust pack overall.
Pros: Higher capacity per cell = fewer cells needed (a 72V/40Ah NMC pack needs ~160 cells instead of 240+). Fewer spot welds means fewer potential failure points. Better energy density. The industry standard going forward — more R&D investment means these keep improving.
Cons: Slightly more expensive per cell than 18650. Less variety currently available in Pakistan's grey market. Still requires skilled assembly for EV packs.
Dimensions: 32mm diameter × 65/70mm long — these are chunky cylindrical cells, noticeably fatter than a C battery. You'll almost exclusively find these in LiFePO4 chemistry, and they're the go-to cell for many budget EV packs in Pakistan and China.
Popular brands:
Typical capacity: 5000–6000mAh per cell at 3.2V nominal. A 72V/40Ah LFP pack using 32650 cells would be 24S8P — that's 192 cells. Doable, but the physical size of each cell means the pack is bulky and heavy.
Pros: Excellent for LiFePO4 chemistry builds, high cycle life (3000+ cycles typical), great thermal stability in Pakistan's heat, screw-top variants allow bolted connections instead of spot welds.
Cons: Heavy — significantly more weight per Wh than 18650/21700 NMC cells. Physically large packs. Lower energy density means a bigger battery box needed on the bike. Not ideal for weight-sensitive builds.
Flat rectangular aluminum-cased cells — these look like small metal bricks. Sizes vary widely, from phone-battery-sized units to massive slabs the size of a laptop. For EV applications, we're talking about cells in the 50Ah to 280Ah range — each individual cell holds more energy than an entire small cylindrical pack.
Major manufacturers:
Typical capacity: 50Ah–280Ah per cell. Yes, per CELL. A single EVE LF280K cell holds 280Ah at 3.2V — that's 896Wh in one cell. To build a 72V pack, you just connect 24 of these in series. That's it. 24 cells, 24 connections. Compare that to 192+ cylindrical cells with hundreds of spot welds.
Pros: Highest capacity per cell by far. Easiest to assemble into packs — just bolt busbars between terminals. Fewest connections = fewest failure points. Excellent thermal management (flat surfaces dissipate heat well). Very long cycle life (4000+ cycles for quality LFP prismatics). The cells used in commercial EVs, buses, and energy storage worldwide.
Cons: More expensive per cell (but competitive per kWh). Harder to source in small quantities in Pakistan — most importers deal in bulk. Requires proper compression bands and mounting hardware. Heavy individually (a 280Ah cell weighs ~5.5kg). Overkill for very small packs.
Soft aluminum laminate packaging — think of the battery in your smartphone or the flat pack in a modern laptop. Pouch cells are lightweight and can be made in almost any shape, which makes them popular in consumer electronics and some automotive applications.
However, for EV bikes in Pakistan, we actively recommend against pouch cells:
If someone offers you a pouch cell pack for your bike, walk away.
The form factor is the body. The chemistry is the soul. As we detailed in our battery chemistry guide, different cathode chemistries have fundamentally different characteristics. Here's how they stack up specifically in terms of cell-level performance:
Lithium Titanate (LTO) deserves a mention. At 2.4V nominal, it has the lowest energy density of any lithium chemistry — but it can do 10,000+ cycles and charges from 0 to 80% in under 10 minutes. It's virtually impossible to damage through overcharge or thermal abuse. The catch? It's extremely expensive and rarely available in Pakistan. If you're building a commercial fleet vehicle that charges 10+ times a day, LTO is worth investigating. For personal EV bikes, LiFePO4 remains the sweet spot.
C-rating is one of the most misunderstood — and most lied-about — specs in the battery world. Here's what it actually means, with real math.
C-rating tells you how fast a battery can safely discharge relative to its capacity. A 1C discharge rate means the battery delivers its full capacity in 1 hour. 2C means it delivers full capacity in 30 minutes. Simple.
Let's use a 20Ah pack as our example:
Here's where it gets sneaky. Every cell has two C-ratings:
A cell marketed as "5C" might only have a continuous rating of 1C or 2C. The 5C spec is a peak burst that can't be sustained. In Pakistan's market, sellers almost always quote peak C-ratings. Ask for the continuous spec. If they can't tell you, they don't know what they're selling.
| Riding Scenario | Typical Draw | Min C-Rating (Continuous) | Recommended |
|---|---|---|---|
| Lahore flat commute | 15–30A | 0.5–1C | 1C is plenty |
| Karachi city traffic | 20–40A | 1C | 1.5C for comfort |
| Islamabad hills | 40–80A | 2C | 2–3C minimum |
| Murree/mountain roads | 60–100A+ | 3C+ | 3–5C for safety margin |
| Heavy load / Rickshaw | 50–100A | 2–3C | 3C minimum |
| Racing / Performance | 80–150A+ | 5C+ | 5C+ (specialized cells) |
If your motor draws 60A and your pack is 20Ah, that's 3C — stressful for many cells. But if your pack is 40Ah, the same 60A draw is only 1.5C — comfortable for almost any quality cell. This is why we often recommend a bigger pack rather than a higher C-rated cell. You get more range AND less stress on every cell. Win-win.
Understanding S and P ratings is crucial. S = Series (adds voltage). P = Parallel (adds capacity). Here are the common configurations for every voltage tier in Pakistan:
| Chemistry | Config | Actual Voltage | Typical Capacity | Best For |
|---|---|---|---|---|
| LiFePO4 | 16S (16 × 3.2V) | 51.2V | 16S4P = 20Ah / 16S5P = 25Ah | CD70 conversions, short commutes |
| NMC | 13S (13 × 3.7V) | 48.1V | 13S6P = 15–18Ah / 13S8P = 20–25Ah | Lightweight city builds |
48V is the entry point. It's what you'll find on most Chinese imported e-scooters and basic CD70 conversions. Good for flat-road city commuting at moderate speeds (40–50 km/h). Limited for highway use or heavy riders.
| Chemistry | Config | Actual Voltage | Typical Capacity | Best For |
|---|---|---|---|---|
| LiFePO4 | 20S (20 × 3.2V) | 64V | 20S4P = 20Ah / 20S5P = 25Ah | CG125 conversions, medium range |
| NMC | 16S (16 × 3.7V) | 59.2V | 16S6P = 18–21Ah / 16S8P = 24–30Ah | Sportier city builds |
60V is the middle ground — noticeably more torque and top speed than 48V. Popular for CG125 conversions where the rider wants decent performance without going full 72V. A solid choice if your commute is under 40km one-way.
| Chemistry | Config | Actual Voltage | Typical Capacity | Best For |
|---|---|---|---|---|
| LiFePO4 (Prismatic) | 24S (24 × 3.2V) | 76.8V | 24S × 50–280Ah prismatic | MZEV standard, highway capable |
| LiFePO4 (32650) | 24S (24 × 3.2V) | 76.8V | 24S4P = 20Ah / 24S8P = 40Ah | Budget 72V builds |
| NMC (21700) | 20S (20 × 3.7V) | 74V | 20S8P = 32–40Ah / 20S10P = 40–50Ah | Max range, weight-sensitive |
72V is where things get serious — and it's our standard at MZEV. This voltage tier gives you highway-capable speeds (80+ km/h), strong hill-climbing ability, excellent range, and compatibility with the best controllers and motors available. It's what we recommend for daily riders who want a genuine petrol-replacement vehicle.
Our standard build uses 24 prismatic LiFePO4 cells in series — typically CATL or EVE grade-A units. Why? Because 24 bolted connections are inherently more reliable than 200+ spot welds. Each connection point is a potential failure point, and in Pakistan's vibration-heavy riding conditions, fewer connections = longer pack life. The math is simple: prismatic wins for reliability.
This is the math every EV bike owner should understand. It's simple:
Voltage (V) × Capacity (Ah) = Energy (Wh)
Example: 72V × 40Ah = 2,880Wh = 2.88 kWh
Now, how far does that get you? In Pakistan's conditions — factoring in rider weight (70–90 kg), bike weight, road quality, speed, and terrain — the rule of thumb is:
So our 2,880Wh pack on flat Lahore roads: 2,880 ÷ 15 = 192 km. On Islamabad hills: 2,880 ÷ 20 = 144 km. Real-world numbers from real-world riding.
| Pack Spec | Energy (Wh) | Flat City Range | Mixed Range | Hilly Range |
|---|---|---|---|---|
| 48V × 20Ah | 960 Wh | ~64 km | ~53 km | ~44 km |
| 60V × 25Ah | 1,500 Wh | ~100 km | ~83 km | ~68 km |
| 72V × 30Ah | 2,160 Wh | ~144 km | ~120 km | ~98 km |
| 72V × 40Ah | 2,880 Wh | ~192 km | ~160 km | ~131 km |
| 72V × 50Ah | 3,600 Wh | ~240 km | ~200 km | ~164 km |
| 72V × 60Ah | 4,320 Wh | ~288 km | ~240 km | ~196 km |
Note: These are estimates based on average conditions. Actual range depends on rider weight, tire pressure, wind, speed, and riding style. Our customers typically report ranges within 10–15% of these estimates.
This is not a theoretical problem. The majority of "Samsung" and "LG" branded 18650 and 21700 cells sold in Pakistani markets — especially in Hall Road Lahore, Saddar Rawalpindi, and Bolton Market Karachi — are counterfeit. They are low-grade Chinese cells wrapped in fake Samsung/LG heat-shrink. Some don't even have the correct chemistry — we've seen "Samsung 30Q" wrappers on cells that tested at 1200mAh instead of 3000mAh. That's a 60% capacity shortfall that will destroy your pack's performance and potentially create a safety hazard.
If the price seems too good to be true, it IS too good to be true. There are no shortcuts with lithium cells. Cheap cells mean either fake branding, recycled/used cells, or bottom-grade rejects from the factory. Any of these will cost you more in the long run — through premature pack failure, reduced range, or worse, a fire.
International battery guides don't account for the unique challenges of building and running EV packs in Pakistan. Here's what matters on the ground:
Pakistan's summers push batteries harder than almost anywhere in the world. Here's how cell types rank for heat survival, from best to worst:
Theory is great, but what can you actually buy in Pakistan?
| Cell Type | Per Cell (PKR) | Per kWh (PKR) | Availability |
|---|---|---|---|
| 18650 NMC (genuine) | 600–1,000 | ~55,000–70,000 | Moderate (verify carefully) |
| 21700 NMC (genuine) | 800–1,400 | ~45,000–65,000 | Limited (import preferred) |
| 32650 LFP | 400–700 | ~40,000–55,000 | Good (established importers) |
| Prismatic LFP (CATL/EVE) | 3,000–15,000 | ~30,000–45,000 | Good (bulk import channels) |
| Fake "Samsung" 18650 | 150–350 | Worthless | Everywhere |
Pakistan's power situation creates unique charging patterns that affect different cells differently:
This is often overlooked but critically important. Pakistan's road conditions — potholes, speed bumps, unpaved sections, canal roads — subject your battery to constant vibration and impact. This affects pack longevity in a very practical way:
We've opened cylindrical packs that tested perfectly on the bench but had 3–5 cracked spot welds visible under inspection. The cells were fine. The BMS was fine. The welds failed because the pack was mounted rigidly to a CG125 frame with no vibration dampening and ridden daily on Lahore's canal road for 8 months. Always use vibration-dampening mounting — rubber mounts, foam padding, or spring-loaded battery boxes — especially with cylindrical packs.
After 200+ builds, we've settled on LiFePO4 prismatic cells as our standard for a reason — actually, for many reasons:
Yes, we could build packs with cheap 18650 cells and undercut our competitors on price. But we've seen what happens 12 months later: cracked welds, unbalanced cells, degraded capacity, and customers who spend more replacing a cheap pack than they would have spent on a good one. We'd rather sell you one pack that lasts 5+ years than two packs that each last 18 months. That's the MZEV philosophy.
The cell is the atom of your battery pack. Everything — range, reliability, safety, lifespan — traces back to what's inside those nickel strips and busbars. Don't let anyone sell you a "battery" without telling you what cells are in it. That's like buying a bike engine without knowing what's inside the cylinder. At MZEV, we believe you deserve to know exactly what powers your ride. Every cell. Every spec. Every time.
The Pakistani EV market is growing fast — and with it, the number of sellers offering mystery packs with unknown cells, fake branding, and inflated specs. Your defense is knowledge. Now you have it.
Whether you're buying from us or building your own, use this guide as your checklist. Ask about cell form factor. Ask about chemistry. Ask about brand and grade. Ask for test data. If the seller can't answer, they don't deserve your money.
And if you want a pack built properly — with verified CATL/EVE grade-A prismatic cells, tested individually, assembled with copper busbars, monitored by a smart BMS — that's exactly what we do. Every single build.
Every MZEV pack uses verified, tested cells. No mystery. No fakes. Get a quote.