E-commerce · Mobile Phones & Accessories
The box shows a very large number, and the buyer wants to know how many charges that really means.
Capacity on the box is not capacity delivered. Every buyer has heard that a bank labelled with a big number gives much less to the phone, and reviews now report real results. A seller who explains the gap and says how many full charges to expect for popular phones earns the buyer’s trust.
A 90-minute audit call and a written, scored report. Turnaround, reporting and term are agreed in writing after the audit.
In one paragraph
Power banks e-commerce is the online sale of portable batteries rated in mAh, with fast charging, multiple ports and wireless options, bought by commuters, travellers and families. GullySales works on how your listings explain capacity in real charges, how you show safety and travel suitability, and how a power bank becomes a gift or a team purchase.
Travel adds a second question: can I carry it on a flight.
Last updated 7 Oct 2026. Product, labelling and advertising rules for mobile phones & accessories differ by product and change. We describe them in general terms, so check the current position with your own adviser or the regulator before you publish a claim.
Who it is for
This is written for you if you sell power banks online.
- Brands selling power banks in the mid and premium range
- Sellers of slim, wireless and fast-charging banks for phones and laptops
- Corporate gift suppliers who sell branded power banks in bulk
- Sellers of travel kits that include a bank and a charger
Not for
It is not the right fit if.
- A seller whose stated capacity does not match what the product delivers
- A seller who cannot say what safety testing the battery has passed
How buyers choose
What decides the sale of power banks.
Capacity in real charges
mAh on the box, output at the port and how many times it charges a named phone. The buyer wants the last number.
Output, ports and speed
USB-C and USB-A ports, fast charging in watts, pass-through charging and whether it can charge a laptop. A buyer with two devices wants two ports.
Size, weight and carry
Pocket size or bag size, and the weight. Travellers also ask about carrying it on a plane, and the rules differ by airline and country, so the page should point to the airline’s own advice.
Safety and build
Cell quality, overheat protection and the markings on the product. The buyer reads reviews for swelling, heat and failure, and what you may say about safety is checked with your adviser.
Where sales are lost
What usually goes wrong when you sell power banks online.
In the words sellers use on the first call.
“Reviews say it only charged the phone once”
The label shows capacity at the cell and not at the port. A buyer who expected three charges feels cheated, whatever the maker’s fine print says.
“We lose travellers who worry about flying”
A buyer asks if the power bank is allowed in hand luggage. If the page has no answer and no link to airline guidance, the buyer chooses a seller who does.
“Corporate gift buyers ask for branding and never get a quote”
An HR team wants a logo on three hundred power banks. A request on WhatsApp with no artwork, price and date sinks the order.
The scope
The work we would propose for power banks.
Measured on purchases, conversion rate, cost to win a customer, average order value and repeat purchases. Anything here that needs a platform or tool we have not used with you is confirmed in the audit before it goes in the scope.
- Capacity explained in chargesA table for each power bank showing mAh, output and the number of charges for named phones, based on your own test results.
- A travel and safety pageA page on carrying a power bank on flights and trains that points to the carrier’s rules, and on safe use and storage, checked with your adviser.
- Comparison pagesA page that sets out two or three of your power banks side by side by size, ports and speed, for common buyer choices.
- Corporate gifting routeA request form for branded orders with quantity, logo, colour and date, and a follow-up routine for each quote.
- Travel and exam-season campaignsCampaigns timed to holiday travel and long journeys, and to festival gifting, with delivery dates in the ad.
What we do
What you get for power banks.
Each deliverable and what it is there to change.
A real-charges table for each model
A short table that shows what the power bank delivers to popular phones, measured by you, to cut the one-charge reviews.
A carry-on guidance page
A plain page that says what to check with an airline, linked from every power bank listing.
A corporate order request form
Fields for quantity, logo file, colour and date, and a standard reply with a sample and a proof.
A power bank comparison page
A single page that helps a buyer choose between your slim, high-capacity and laptop-ready models.
How the result is measured
- Purchases
- Conversion rate
- Customer acquisition cost
- Average order value
- Return rate
- Corporate quotations requested
Recorded as a baseline before work starts, so every later report has an honest comparison.
How it works
From your first message to the first report.
No open-ended retainer. Every step gives you something in writing.
First
Free audit call
90 minutes with whoever handles your enquiries: how they arrive, how fast they are answered, where they are lost.
After the call
Written, scored report
Six areas scored, fixes ranked by return and cost. If you want our help, the scope, the fee and the reporting come with it, in writing.
Before work starts
Baseline recorded
Enquiries by source, reply time, conversion and cost per order, written down so every later report has an honest comparison.
After the baseline
The first fix goes live
Usually the cheapest one on the report: reply time, a follow-up sequence or the marketing-to-sales handover.
As agreed
Report against the baseline
What moved, what did not, and what changes next, in plain words. How often you get it is set in writing before work starts.
At renewal
Renew on the numbers
The term ends and you decide whether to continue from the results. The length is agreed in writing before anything starts.
What we need from you
What to have ready before the audit call.
None of it has to be tidy. We read what you have.
- Your power banks with mAh, output, ports and weight
- Any test results you hold for real capacity
- Reviews and returns that mention capacity or heat
- Corporate gift enquiries and what happened to each
- Your marketplace listings and ad spend
Selling in India and abroad
Selling power banks beyond your own market.
Where you sell decides sizes, units, seasons and returns. We work from Bengaluru and have no overseas office, so for a new country we start from your own sales and the platforms you already use.
Batteries are regulated in transit
Lithium batteries face shipping restrictions that differ by carrier and country, and may rule out some routes. Your courier and adviser confirm what can go overseas.
Marking and plug standards
Chargers sold with a power bank must suit the plug and voltage of the buyer’s country. A bank sold alone has fewer issues but still needs the local safety marking checked.
FAQ
Questions about selling power banks online.
Not here? More answers, or ask on WhatsApp.
How do I explain the difference between mAh and real capacity?
Can I say my power bank is airline approved?
Is there a market for branded power banks as corporate gifts?
How much does it cost?
How long is the contract?
How soon will we see results?
Who will actually do the work?
What do you need from us?
What if we are not happy with the work?
More in Mobile Phones & Accessories
Sellers of power banks also need
Also selling from a shop, a workshop or a warehouse? See the page for electronics and appliance stores.
This page is part of the e-commerce section. The D2C brands page covers the arithmetic of acquisition cost and the second order for any brand.
Why us
Why owners pick GullySales over an agency.
Marketing and sales, as one job
Most agencies stop at the enquiry. We also fix what happens after it: the reply, the follow-up, the quote and the CRM.
The person on the first call does the work
No account managers in between. You are never handed to someone you have not met.
A baseline before anything starts
Your numbers are written down on day one, so every later report compares against something honest.
The fee in writing, split three ways
Our time, your media spend and production on separate lines. You always see what goes to us.
No guarantees we cannot keep
The term is agreed in writing and never a default twelve months. We never promise a ranking or a lead count, because nobody controls those.
One office, and we say so
Nagarbhavi, Bengaluru. We work across India by call and WhatsApp and travel when a session needs to be in person.
#257, 3rd floor, Sri Nanjundeshwara Complex, Nagarbhavi 8th Block, Outer Ring Road. How we work.
Engagement options
Ways to work with us.
Pick the size of commitment that fits. Every option starts with the free audit.
Option 1
The audit on its own
A 90-minute call and a written, scored report. It says honestly whether you need outside help, and many fixes are ones your own team can make.
Option 2
One fix, scoped
Start with the fix the audit ranks first, such as reply time or follow-up. The fee is in writing before anything starts.
Option 3
An ongoing programme
We run the work, report against the baseline, and you renew on the numbers. The term and the reporting are agreed in writing first.
Option 4
Guidance for your own team or agency
We plan, brief and check the work of your in-house team or current agency, instead of replacing them.
The offer
Start with a free audit of how your power banks sell.
It is useful on its own, whether or not you hire us.
What you receive
- A 90-minute call with the person who will do the work
- A written, scored report on the six places orders leak
- Every fix ranked by what it returns and what it costs
- The one thing to do first, and why
- An honest line on whether you need outside help at all
- If you do, the scope and the fee in writing
No invoice. No obligation. No sales script.
Your next practical step
Get a free audit of how you sell, and a scored report of where the work is.
90 minutes. A written, scored report. No invoice and no obligation.