Can a power bank actually charge a laptop, or does it just top it up?

It depends on the output, not the mAh figure. A power bank only charges a laptop properly if its wattage meets or exceeds what the laptop draws while in use. GRAVL's laptop power banks are built around this: the Axis 67 outputs 67W, the Forge 130 outputs 130W total (65W + 65W simultaneously), and the Engine 240 outputs 240W total (140W + 100W simultaneously).

Which GRAVL power bank works with my MacBook?

The Axis 67 is sized for a MacBook Air M2 or M3 and similar ultrabooks. The Forge 130 is built for a MacBook Pro 14-inch, especially when a phone needs to charge at the same time. The Engine 240 is built for a MacBook Pro 16-inch M4 Max running at full load, and also covers high-performance Windows laptops like the Dell XPS, ASUS ROG, and HP Spectre.

Arethese laptop power banks allowed on flights in India?

Yes. All three the Axis 67 , Forge 130 , and Engine 240 stay within IATA's 100Wh carry-on limit, so none require prior airline approval. The Engine 240 sits at 97.2Wh, just 2.8Wh under that ceiling, making it the highest-capacity airline-compliant option in the collection. Full rules at Airline Rules for Laptop Power Banks .

Can I charge my laptop and phone from the same power bankat the same time?

Yes, iPhone 12 or newer. The GRAVL Qi Surface power bank delivers 25W wireless charging on iPhone 16 and 17. Faster than Apple's own MagSafe on older models. If wireless has ever frustrated you, this is the version that doesn't.

Whatis the warranty on GRAVL's laptop power banks?

Every laptop power bank in this collection carries a 4-year warranty : 1 year unconditional from the date of purchase, plus an additional 3 years on the battery once the product is registered . Both parts of the warranty apply regardless of which model is purchased.

Compact Power Bank 10000mAh with Built-in Cables

1 product

Sigma 35 Power Bank 10000mAh

Rs. 3,675.00

Compact Power Bank for Work, Travel and Everyday Use

A reliable compact power bank lets you carry enough backup power without adding unnecessary bulk to your pocket or bag. The GRAVL Sigma 35 combines a 10,000mAh battery, up to 35W Power Delivery, and built-in Type-C and Lightning cables in a portable design created for everyday charging.

It is suitable for commuters, students, professionals, and travellers who depend on their phones, tablets, and earbuds throughout the day. Instead of carrying a large battery pack and separate wires, you get a small power bank that is ready to connect when your device begins running low.

Why Choose a Compact Power Bank?

High-capacity power banks can be useful for laptops and longer journeys, but they are not always convenient for daily carrying. A 10,000mAh compact power bank provides a practical balance between portability and usable capacity.

It can fit more easily into a handbag, backpack, or travel pouch and is simpler to carry during commutes, meetings, university days, and short trips. The Sigma 35 is designed primarily for smartphones, tablets, earbuds, and other compatible portable devices. Customers who need to charge a laptop should instead explore GRAVL’s laptop power bank collection.

10,000mAh Capacity for Dependable Daily Charging

The Sigma 35 offers 10,000mAh capacity for keeping essential devices powered between access to wall charging. For many modern smartphones, this can provide approximately 1.5 to 2 full charges. Actual performance will vary depending on the phone’s battery capacity, device usage, charging efficiency, and environmental conditions.

This capacity makes the Sigma 35 especially useful for navigation, calls, online payments, photography, and work applications when you are away from a socket. It provides meaningful backup power while remaining more portable than a 20,000mAh or 27,000mAh model.

Up to 35W Fast Charging with USB-C Power Delivery

The Sigma 35 supports up to 35W Power Delivery for compatible devices. This allows supported smartphones, tablets, and accessories to recharge more quickly than they would with a basic low-output portable charger.

Charging speed depends on the connected device, its supported charging protocol, and its maximum input. A device that supports less than 35W will draw only the power it can safely accept. This makes the Sigma 35 a flexible fast-charging power bank for different everyday devices rather than a charger limited to one phone model.

Built-in Type-C and Lightning Cables

Forgetting a charging cable can make even a fully charged power bank useless. The GRAVL Sigma 35 solves this everyday problem with built-in Type-C and Lightning cables.

The Type-C connection supports compatible Android phones, newer USB-C devices, tablets, and accessories. The Lightning cable is designed for compatible iPhones and Apple accessories that use a Lightning port. A USB-C port provides an additional connection option. Before purchasing, check the charging connector and power requirements of your device.

Built-in cables also reduce the number of loose accessories you need to pack, making the Sigma 35 a convenient pocket power bank for offices, airports, cafés and daily travel.

BIS-Certified Charging with Multi-Layer Protection

Portable charging should offer more than capacity and speed. The Sigma 35 is BIS certified and uses multi-layer protection against overcharging, over-discharging, over-voltage, overheating, short circuits, and current backflow. Its flame-retardant housing provides an additional layer of protection for regular use.

Customers who place battery chemistry at the centre of their decision can also consider the GRAVL Core 30, which uses semi-solid-state battery technology at the same 10,000mAh capacity.

A Compact Power Bank for Air Travel

With an energy rating of approximately 37Wh, the Sigma 35 falls below the general 100Wh threshold commonly applied to power banks carried by passengers. Power banks must normally be kept in cabin baggage rather than checked luggage. Regulations concerning quantity, onboard use and charging may vary, so travellers should always confirm the latest requirements with their airline before departure.

Read GRAVL’s guide to power bank rules for Indian and international flights before travelling.

Four-Year GRAVL Warranty

The Sigma 35 is supported by GRAVL’s four-year warranty. The first year covers the complete product against eligible manufacturing defects. Years two through four provide extended battery coverage after the product is registered within 30 days of purchase. Customers should review the complete warranty conditions and retain valid proof of purchase.

Choose the Sigma 35 if you want a compact power bank with built-in cables for everyday phone charging. For wireless magnetic charging, consider the GRAVL Qi Surface. For supported laptop charging, the GRAVL Axis 67 is the correct starting point.

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Our customer support is available monday to friday: 8am-8:30pm.Average answer time: 24h

What is a compact power bank?

A compact power bank is a portable battery designed to provide backup charging without taking up too much space in a pocket, handbag, backpack, or travel pouch. It is generally suitable for phones, tablets, earbuds, and other small electronic devices.

Which is the best compact power bank in India?

The best compact power bank in India depends on your required capacity, charging speed, device compatibility, size, safety features, and warranty. Look for USB C fast charging, BIS certification, suitable connectors, and clear warranty coverage.

Is a 10000mAh compact power bank enough for daily use?

A 10000mAh compact power bank is sufficient for many daily charging needs, including commuting, office work, college, events, and short journeys. Users who need to charge several devices repeatedly may prefer a higher capacity power bank.

How many times can a 10000mAh power bank charge a phone?

A 10000mAh power bank can generally provide approximately 1.5 to 2 complete charges for many modern smartphones. The actual number depends on the phone's battery capacity, charging efficiency, device usage, temperature, and normal energy conversion loss.

Do compact power banks support fast charging?

Many compact power banks support fast charging through USB C Power Delivery or other compatible charging protocols. The actual charging speed depends on the power bank's output and the maximum input supported by the connected device.

Are compact power banks compatible with iPhone and Android phones?

Most compact power banks can charge compatible iPhone and Android models. Check whether the power bank provides USB C, Lightning, wireless charging, or other connection options required by your specific phone.

Should I choose a compact power bank with built in cables?

A compact power bank with built in cables is convenient for everyday use because it reduces the need to carry separate charging wires. Before purchasing, confirm that the built in connectors are compatible with your devices.

Can a compact power bank charge a laptop?

Most compact power banks are designed primarily for phones, tablets, earbuds, and smaller devices. Laptop charging requires sufficient USB C Power Delivery output, so check the laptop's wattage requirement and choose a dedicated laptop power bank when necessary.

Are compact power banks allowed on flights?

Compact power banks below 100Wh are generally permitted in cabin baggage but should not be placed in checked luggage. Airline rules regarding quantity, storage, and onboard use can vary, so confirm the latest policy with the operating airline before travelling.

What should I check before buying a compact power bank?

Check the battery capacity, charging output, USB C Power Delivery support, connector compatibility, built in cables, size, weight, BIS certification, safety protections, airline suitability, and warranty coverage. Choose a model that matches your devices and daily charging requirements.

Our customer support is available monday to friday: 8am-8:30pm.Average answer time: 24h