Acer AP18C4K 11.4V 48Wh 3-Cell Aspire 3 / Aspire 5 / Swift 3 Replacement Battery Wholesale

Q1: What is the difference between the AP18C4K and AP18C8K? Can I order either for my Acer fleet?
A1: The AP18C4K is rated at 11.4V (3ICP5/81/68) and the AP18C8K at 11.25V (3INP5/82/70). Both use the same physical dimensions and connector, and both appear in overlapping Acer model series depending on production batch. However, they are not electrically identical: the BMS in some devices is calibrated to the original unit’s voltage spec and may not recognize or charge the mismatched variant. For fleet orders, check the label on the actual batteries in the devices before ordering — do not rely on the laptop model number alone. We supply both variants; specify which part number you need at the time of inquiry.

Q2: We manage a mixed Acer fleet from 2018–2021. How do we know if the AP18C4K covers our devices?
A2: The AP18C4K covers Acer’s Intel-platform budget and midrange devices from that generation: Aspire 3 A315-42/54, Aspire 5 A514-52/A515-43/44/54/56, Swift 3 SF314-41/57/58/59, Swift S40-51, Spin 3 SP313-51N/SP314-54N, and TravelMate P2 P214-52/53. If your fleet includes those model families, a single AP18C4K stock position will cover the majority of replacements. We can issue a compatibility checklist for your specific device asset list on request — submit model numbers and we will confirm fitment before you place a bulk order.

Q3: What is the actual mAh capacity of the AP18C4K? We have seen figures ranging from 3280mAh to 4200mAh from different sellers.
A3: The OEM-matched spec for the AP18C4K is 4200mAh / 48Wh at 11.4V nominal. The 3280mAh figure cited by some retailers reflects their own lower-spec third-party replacement cells, not the original Acer-rated capacity. The 44Wh figure on iFixit corresponds to their replacement unit, which uses different cells. Our units are built to the 4200mAh / 48Wh specification confirmed across multiple independent sources. Per-batch discharge reports are available on request for procurement teams that require incoming capacity verification against stated spec.

Q4: What is the minimum order quantity and what does the ordering process look like for a repair chain?
A4: Contact us with your required quantity and delivery destination. We recommend a sample order of 5–10 units as an initial step for new accounts — this lets your technicians verify fitment and runtime before committing to volume. After sample confirmation, standard bulk orders are processed with 3–5 business days dispatch for stocked items. We provide a proforma invoice for purchase order processing and can accommodate split shipments across multiple locations for repair chains with distributed sites.

Q5: Does this battery support the Acer Swift S40-51? That series is less commonly listed on supplier pages.
A5: Yes. The Swift S40-51 (also listed as Swift 3 S40-51 in some regional catalogs) uses the AP18C4K as its OEM battery. It appears less frequently on competitor product pages because most listings prioritize the higher-volume Aspire 5 A515-43 as the lead model, but the S40-51 is a confirmed AP18C4K fit. Buyers servicing the S40-51 can order the same SKU as for the Aspire 5 A515-43 without modification.

Q6: Can you supply AP18C4K with private-label or OEM packaging for our brand?
A6: Yes. OEM and private-label packaging is available from a specified minimum order quantity. We handle custom box printing, custom label design, and documentation (compliance sheets, warranty cards) to match your brand requirements. Lead time for first-run private-label orders is typically 7–14 business days depending on packaging complexity. Request a packaging spec sheet and MOQ details through our inquiry form or direct contact.