10,000 mAh Power Banks Under ₹1,000
Ambrane 10,000 mAh (₹699–₹899) — BIS certified, dual USB-A output, 12W charging. Charges a typical 5,000 mAh phone battery 1.8x. One of the best-reviewed budget power banks in India with 30,000+ ratings.
boAt Energyshroom 10,000 (₹799–₹999) — boAt's entry power bank. Compact design, 12W output, reliable. Good choice if you already use boAt devices.
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20,000 mAh Power Banks ₹1,000–₹1,500
Mi 20,000 mAh Power Bank 3i (₹1,199–₹1,499) — Xiaomi's most popular large-capacity power bank. 18W fast charging (both input and output), triple output ports, BIS certified. Can charge most phones 4x on a single charge. Strong build quality for the price.
Ambrane 20,000 mAh (₹999–₹1,299) — Budget 20k option. Slower charging (10W) but reliable and well-reviewed. Best for price-sensitive buyers who don't need fast charging.
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What to Check: BIS Certification and Capacity Claims
Always buy BIS-certified power banks — uncertified units use low-grade cells that degrade fast and can swell or overheat. The BIS mark appears on the product page or box. Also note: a 20,000 mAh power bank delivers roughly 12,000–13,000 mAh to your device due to conversion losses — don't expect 4 full charges on a 5,000 mAh battery.