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We’ve been using these in solar storage setups for about six months now, and they handle daily charge-discharge cycles without a hitch—actually better than the lithium units we had before, especially when temps drop below zero.
It’s a cylindrical 40140 cell with 15Ah capacty at 3V nominal, giving you 46.5Wh per cell, and the internal resisance is under 0.5mΩ so you don’t lose a ton of energy as heat; typical cycle life is over 2,000 cycles, and we’ve seen that hold up in our field tests so far.
Teh thing weighs about 4.7kg, which is a bit more than you’d expect for similar lithium cells, but for stationary solar banks that trade-off is fine given the wider operating range—-40°C to 60°C basically covers anywhere we’d set up panels.
1C continuous discharge is standdard, but you can push it to 3C for short bursts under 30 seconds if needed; we usually stock about 50 units or so ready to ship, and OEM service is avaliable if you need custom labels or wiring.
Roughly 20,000 cells roll out per day here, so lead time is typically 10-15 working days unless you’re ordering a very large lot (check on that first).
We can work with MOQs as low as 100 pieces for initial orders, though larger quantities get better pricing. For custom OEM/ODM builds, the MOQ typically starts at 1,000 units.
Yes, all required certifications—ISO9001, CE, ROHS, UN38.3, and MSDS—are included with every order. We can share copies before shipping.
That weight (4.7±0.5kg) is per single 40140 cell. It’s heavier than a typical lithium cell of similar capacity because sodium-ion chemistry uses different materials, but you get a 2000-cycle lifespan and wide temperature tolerance.
Yes, we offer OEM/ODM service—so we can adjust the nominal capacity, dimensions, or even the discharge rate within reason for volume orders. Just share your spec sheet, and we’ll quote accordingly.
For standard 40140 cells, lead time is about 15-20 days from payment for orders up to 10,000 units. Custom orders may take 25-30 days depending on the changes.
Outstanding experience from start to finish. The logistics were handled with remarkable efficiency; the shipment arrived ahead of schedule and was packaged securely, ensuring the products were in perfect condition upon arrival. The quality of the battery cells is immediately apparent, with solid construction and precise specifications that match the description perfectly. Customer service was equally impressive, providing clear communication and prompt responses to all inquiries. Overall, a highly professional and reliable transaction that inspires confidence for future orders.
Keenly satisfied with the overall experience. The shipping was remarkably fast and the packaging was secure, ensuring the items arrived in perfect condition. Regarding the product quality, the cells appear to be very well-made and robust, exactly as described. The customer service team was prompt and professional in answering my pre-sale inquiries. This efficient logistics, apparent high quality, and responsive support make for a very positive wholesale purchasing process. I look forward to seeing the performance in our solar storage application and would certainly consider ordering again based on this initial transaction.
