Anker Prime 27,650mAh 250W (A1340): problems, parts and running costs

Checked: 2026-10-17

Summary

Owners most often report units that arrive or go dead: showing 100% only while plugged into input, boot-looping when a device is attached, or throwing E107 undervoltage errors, and no defect rate for any of it has been published. The seven-cell battery is not user-swappable and Anker publishes no service price, so a failed or swollen pack is a warranty or recycling case. Running cost is electricity only — a full recharge draws 107.4Wh from the wall, roughly $1.40 a year at $0.25/kWh charged weekly — and for a verified new full-warranty unit under $135 is attractive, $135–$165 reasonable, while $179.99 or above means comparing the newer A110A 26K 300W.

Common problems and fixes

Unit arrives or becomes unresponsive — r/anker and r/computers owners describe units that worked briefly, then displayed 100% only while connected to input and powered nothing, or boot-looped when a device was attached; one owner’s replacement unit also stopped charging after about 30 seconds. No defect percentage for this model has been published. If the symptom recurs with a known-good charger and cable, stop relying on it and request warranty service: the 24-month warranty covers the original purchaser. [1][2][3][15]
E107 undervoltage errors — one owner hit repeated E107 errors on C1, then C2, when charging an iPhone 15 Pro, and neither resets nor cable changes helped; that unit was bought in Vietnam and used in Indonesia, which can complicate warranty service. Do not bypass the protection or keep forcing discharge. [4]
Displayed charge jumps or collapses — one owner saw the indicated charge rise from 74% to 85% without charging after the unit rested; another saw it drop from 99% to 0% while charging an iPhone. Check delivered energy in Wh with a USB-C load meter instead of trusting the screen, and treat persistent shutdown while ostensibly charged as a return or service case. [5][6]
Standard reset advice fails — the “C1-to-C2 loop with a cable” reset did not work for one owner; multiple commenters reported that holding the side button for 5 seconds, then pressing it five times, succeeded. This is community experience, not an Anker service bulletin, and a reset cannot revive a broken cell or cracked connector. [7]
Clock and date corruption after a full drain — one owner saw an implausible time and date after fully draining the battery; reconnecting the app re-synced it. A display annoyance, not a cell fault. [9]
Charging base cannot cold-start a dead bank — ComputerBase found a fully discharged A1340 will not start charging on the 100W pogo-pin dock until some energy is restored via USB-C, which cuts the dock’s convenience after deep discharge. [10]

Parts and consumables

A1902 100W charging base — $109.99 in Anker’s US catalog (October 2026); a pogo-pin dock sold separately from the bank, with no replacement cycle. Buy it only if docking convenience is worth an accessory costing much of a used bank’s price. [13]

Yearly running cost

Electricity is the only running cost. ComputerBase’s August 2025 test measured 107.4Wh drawn from the wall for a full recharge, and at an assumed $0.25/kWh that is 5.58kWh/year, about $1.40, charging once a week; charging daily would be 39.20kWh/year, about $9.80. The figure comes from a test bench, not every user’s charger efficiency or an aging pack. There are no filters, subscriptions or other consumables, and battery-replacement cost is not published. [10]

When it is a good buy

Anker’s own US site has the A1340 sold out. Best Buy carried a marketplace offer at $179.99 in October 2026, sold and shipped by third-party AnkerDirect, while a separate Best Buy catalog route for the same SKU says the item is no longer available in new condition; Walmart listed the same SKU at $179.99, out of stock. [11][16][17]
eBay completed sales in September 2026 for used units ran from $70 plus $5.93 shipping to $112.50 plus $17.56 shipping, and another used unit went for $79.99. These are individual completed sales, not a market average. [18][19][20]
Anker’s public recall page did not list the A1340 as of October 2026; recheck it before buying used or flying with the bank. [23]