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The actual usable capacity is typically 70-80% of the stated capacity due to conversion losses, heat dissipation, and voltage conversion. For example, a 10000mAh power bank will deliver around 7000-8000mAh of actual charging capacity to your devices.

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Yes, BIS certification is mandatory by law for all power banks sold in India since 2018. Non-BIS certified power banks can be confiscated at airports and may pose safety risks. Always look for the BIS mark on the product and packaging before purchasing.

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Power banks are allowed in carry-on luggage only, not checked baggage. Capacity limits: up to 100Wh (27000mAh) without approval, 101-160Wh with airline approval. Most airlines in India follow these DGCA guidelines. Always check with your specific airline.

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Charging time depends on input power: 18W input takes 6-8 hours, while 30W+ fast charging can fully charge in 4-5 hours. Always use the original charger or a compatible fast charger to minimize charging time and maintain battery health.

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10000-20000mAh is ideal for daily use in India. It can charge most smartphones 2-4 times, weighs under 500g, fits in bags comfortably, and provides excellent value for money. This capacity covers daily commuting, power outages, and emergency needs effectively.

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Quality power banks with proper safety features do not damage phone batteries. Look for over-charge protection, temperature control, and smart charging. Avoid unbranded or very cheap power banks that may lack safety circuits and could potentially harm your devices.

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No, modern lithium batteries don't require complete discharge. In fact, shallow discharge cycles (20-80%) are better for battery longevity. Charge your power bank when it drops to 20-30% and avoid letting it completely drain to maintain optimal battery health.

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Mi (Xiaomi) offers excellent value with reliable quality, fast charging, and competitive pricing. Other good options include Ambrane (wide service network), Syska (trusted Indian brand), and boAt (trendy designs). For premium quality, Anker remains the best choice despite higher pricing.

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Wireless charging is convenient but slower (5-15W vs 18W+ wired). It's worth it if you have Qi-compatible devices and value convenience over speed. However, for fastest charging and better value, prioritize wired fast charging features first.

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Check for: BIS certification mark, hologram stickers, proper packaging, and brand warranty. Buy from authorized retailers, verify serial numbers on brand websites, and avoid deals that seem too good to be true. Genuine products have proper safety certifications and customer support.