Callmate Power Bank: India Prices, Models and Charging Guide

Callmate models and prices in India

These three listings provide a dated comparison, not a complete catalogue or a recommendation to buy one model over another. Prices and availability below are official-store snapshots from 4 November 2026; they may change. Capacity and charging specifications are manufacturer claims, not independently measured results [1–3].

Minivolt: the 10,000mAh listing

Callmate lists Minivolt with a lithium-polymer battery, a digital display, a detachable cable and built-in USB-C. Its charging description specifies USB-C Power Delivery and USB-A Quick Charge 3.0 output [1]. These connector and protocol details are more useful than assuming every connection delivers the headline 23W.

The reviewed main product page did not state a warranty duration. That is an information gap, not evidence that there is no warranty; written terms for the exact model are needed before relying on a coverage period [1].

Gradient: the 20,000mAh listing

Gradient combines advertised 20,000mAh capacity with a digital display and built-in Lightning and Type-C cables. The page separately lists a Lightning input rated DC 5V, 2.4A, USB-C PD output and USB-A QC output [2]. A Lightning input is a connection for recharging the bank, not automatically another device-charging output.

Its FAQ discusses charging multiple devices, but the reviewed information does not establish power allocation between them. Do not interpret that description as a promise of simultaneous 23W charging for each connected device [2].

Treasury: the advertised 100,000mAh listing

Treasury's page advertises 100,000mAh and 23W PD 3.0 input/output, but showed sold-out status at the recorded ₹6,999 price [3]. The capacity is a listing claim, not a verified measurement of stored or delivered energy.

A large mAh figure does not imply laptop fast-charging capability: the laptop still needs a supported power level and charging profile. Treasury's capacity also does not establish airline eligibility, and its own FAQ says the high capacity exceeds carry-on limits [3].

Understand capacity and charging compatibility

Capacity describes stored charge at a stated voltage; output specifications describe how power can reach a device. Keeping those separate prevents two common mistakes: treating advertised mAh as usable USB-output capacity and treating maximum watts as a guaranteed phone-charging speed [4].

Why mAh does not promise a number of phone charges

Milliamp-hours (mAh) describe electric charge, while watt-hours (Wh) describe energy. Compare energy using the formula Wh = mAh × nominal cell voltage ÷ 1,000. The voltage matters because a cell-capacity figure and a USB-output figure can refer to different voltages [4].

Anker's capacity explanation shows why conversion losses reduce available output, but its illustrative efficiency is not a measured Callmate value [4]. Phone battery energy, conversion efficiency, phone use during charging, temperature and connected devices all affect the result. None of these three listings establishes a reliable full-charge count for your phone; the arithmetic examples below are not charging tests.

Match the protocol, profile and cable—not just watts

Power Delivery (PD) and Quick Charge (QC) are charging protocols, not alternative names for wattage. A 23W claim is a maximum under supported conditions, not a promise that every phone receives 23W. The device, output port, voltage/current profile and cable must work together; the phone's own charging limit still matters.

Keep version claims model-specific: Minivolt lists USB-A QC 3.0, while Treasury advertises PD 3.0 input/output [1,3]. Do not apply those versions across the range. The reviewed evidence does not establish support for every proprietary phone-charging system or Programmable Power Supply (PPS) mode.

A USB-C connector alone does not settle a cable's charging capabilities. Check the cable rating and the relevant port specification, especially when changing from a built-in cable to a separate one. Multiple outputs also do not mean the headline wattage is available independently on every connection.

Separate recharging input from device-charging output

Input is power entering the bank; output is power leaving it for a phone or another device. An output headline cannot tell you how quickly the bank itself recharges. Gradient's listed Lightning input and USB-C PD output illustrate why connector roles need checking separately [2].

Gradient's FAQ gives a four-to-six-hour recharge estimate with a compatible charger. That is a manufacturer estimate, not our timing result or a guarantee for every charger [2]. Its FAQ also advises against pass-through charging—recharging the bank while it powers another device—so do not assume that use is supported; follow the exact model's manual.

Safety, warranty and registration checks

Treat advertised protection features as design claims, not proof that a battery cannot overheat or catch fire. Condition, handling and verified model information remain important; this guide has not tested protection circuits or confirmed a Callmate registration number.

Stop using a damaged or overheating unit

Callmate's Minivolt safety guidance says to stop using damaged, swollen, leaking or overheating units. It also warns against heat, direct sunlight and moisture, and directs users towards authorised e-waste disposal [1]. A remaining-charge display or a functioning output does not override those warning signs.

Do not treat a malfunctioning battery as an ordinary charging-speed problem. Stop using it and follow the manufacturer's handling and disposal instructions rather than continuing to test it with different chargers.

Warranty wording needs model-specific confirmation

Gradient's FAQ says the warranty is typically one year, which needs confirmation against the exact purchase terms [2]. Minivolt's reviewed main page does not define a duration [1]. Neither observation supports a single warranty period for the whole brand.

Treasury has an explicit unresolved conflict: its main-page package information says six months, while its FAQ says twelve months [3]. Do not silently choose the longer or shorter figure. Obtain written model- and seller-specific terms, including coverage and claim requirements; a registration page alone would not resolve contradictory duration statements.

A brand logo is not a registration check

A historical Bureau of Indian Standards (BIS) Compulsory Registration FAQ, Revision 13 from November 2018, explains that registration relates to the manufacturer, factory location, product and brand, with model coverage relevant [7]. Its narrow lesson is that a brand name alone is not enough to verify a particular unit.

No actual Callmate BIS R-number or model registration was checked for this article. Verify the exact product's registration number and model coverage in official records; this historical FAQ neither establishes current model certification nor proves that an unverified unit is unsafe.

Can you carry a Callmate power bank on a flight?

Check the actual Wh label and the operating airline's conditions for your itinerary. A capacity headline or seller's travel wording is not permission to board with a power bank, and restrictions on carrying, storing, using and recharging it are separate questions [5,6].

IATA distinguishes a prohibition from a recommendation

IATA's guidance dated 31 March 2026 describes personal-use requirements following an ICAO addendum: carry-on only, a maximum of two power banks and individual protection against short circuits. Travellers must not recharge a power bank onboard; they should not use one to recharge a personal device [5]. The latter is a recommendation, not the same wording as a universal prohibition.

The guidance discusses an addendum provision for 100–160Wh with operator approval, while noting that it was not carried into the 68th-edition Dangerous Goods Regulations [5]. This is not an approval promise: check the airline's applicable conditions rather than assuming larger banks will be accepted.

Air India's general and Singapore-departure conditions differ

Air India's general battery section specifies a 100Wh limit and a maximum of two spare batteries, with power banks treated as spares. They belong in carry-on, not checked baggage, require individual protection and must not be stored in overhead bins [6]. These are Air India conditions, not a statement about every Indian airline.

Its additional Singapore-departure paragraph limits passengers to two power banks of no more than 100Wh each, in hand baggage, and prohibits both onboard use and charging; new or unopened units receive no exception [6]. Do not apply that route-specific paragraph worldwide. If cabin baggage is gate-checked, keep the power bank out of the checked bag.

Frequently asked questions

What is the Callmate power bank price in India?

The official-store snapshot on 4 November 2026 was ₹1,099 for Minivolt, ₹1,799 for Gradient and ₹6,999 for the sold-out Treasury [1–3]. These are three model listings, not the brand's complete price range or guaranteed future prices.

Will a 23W Callmate power bank fast-charge every phone?

No universal compatibility is established. The phone must support the relevant protocol and voltage/current profile, and the port and cable must support the connection. Maximum wattage alone does not guarantee that speed, proprietary fast charging or PPS support on these models [1–3].

How many full phone charges will 10,000mAh provide?

There is no verified count here. You need the bank's delivered energy, the phone's battery energy and the losses and usage conditions involved. Dividing one advertised mAh figure by another ignores voltage and conversion losses, so it cannot guarantee full charges [4].

Is Treasury's advertised 100,000mAh suitable for air travel?

Its manufacturer FAQ says the high capacity exceeds carry-on limits [3]. This guide has not verified Treasury's actual Wh label or airline acceptance. Do not infer approval from its PD specification, and do not treat the theoretical energy calculation below as a measured label rating.