Description
Ampace JP40 21700 lithium-ion cell
The Ampace JP40 is a 4000 mAh cylindrical lithium-ion cell for high-power battery pack projects. Use the manufacturer specifications below to compare capacity, voltage and current requirements for your application.
Ordering and shipping
Minimum order: 5 cells per model. Quantities are individual cells.
- Canada: C$10 shipping for 5–9 JP30/JP40 cells in total; free shipping for 10+ cells combined. For example, 5 JP30 + 5 JP40 qualify. Select the free shipping option at checkout.
- Quantity pricing is calculated separately for each model.
- United States: C$20 shipping per order of these cells, automatically converted to USD at checkout.
These shipping offers apply to JP30 and JP40 cells; other products follow their own shipping rates. Taxes and import charges, if applicable, are separate.
Manufacturer specifications
| Specification | JP40 |
|---|---|
| Cell format | 21700 |
| Rated capacity | 4.0 Ah (4000 mAh) |
| Rated voltage | 3.70 V |
| Operating voltage | 2.50–4.20 V |
| Rated energy | 14.80 Wh |
| Max. charging current | 8.0 A |
| Max. continuous discharge current | 60 A |
| Max. continuous full discharge current | 40 A |
| Max. constant output power | 198 W |
| Max. weight | 70 g |
| Charging temperature | −10 to 60°C |
| Discharging temperature | −20 to 75°C* |
| Cycle life at 60% SOH | >600 cycles |
Values are cell-level manufacturer specifications, not guaranteed ratings for a complete battery pack. Cycle life is listed at 60% state of health (SOH) on Ampace's comparison page; actual performance depends on operating and test conditions.
Understanding the current ratings: Ampace lists maximum continuous discharge current and maximum continuous full discharge current separately. These are different specifications; do not treat the higher value as a guaranteed full-discharge or finished-pack rating. Ampace also notes that maximum continuous discharge current is not the current used for cycle testing.
*JP40 temperature note: Ampace's comparison page lists −20 to 80°C, while its JP40 model page lists −20 to 75°C. We show the lower upper limit here; confirm the applicable cell datasheet before specifying operation above 75°C.
Source: Ampace cell specifications comparison and JP40 manufacturer product page.
Custom high-power battery packs
We support custom lithium-ion battery pack projects using JP30 or JP40 cells, with specifications confirmed by quotation. Projects can include:
- Golf carts and electric utility carts
- Electric motorcycles and electric dirt bikes
- E-bikes, electric scooters and other light electric vehicles
- Cordless tools and portable equipment
- Robotics and other high-current equipment
Cell selection, pack voltage and capacity, current requirements, BMS, enclosure, connectors and charger compatibility are reviewed for each project. Suitability for a particular vehicle or device is confirmed before an order is accepted.
Request a custom pack quote
Send us your application or vehicle model, target voltage, required capacity or runtime, continuous and peak current (including peak duration), available dimensions, charger details, quantity and delivery destination. Photos, drawings and controller specifications are helpful.
Email your requirements → Request a quote →
Cell and pack use
These are individual cells, not a ready-to-use vehicle battery. Battery packs require suitable protection, thermal management and a compatible charger. Confirm the applicable manufacturer datasheet and pack requirements before assembly or use.
