Hi Barbara,
Following my signature, I’m pasting the Google AI response when searching on what does mah mean in "power bank" specification. Alan Lemly In power bank specifications, mAh stands for milliampere-hour, a unit that measures the electrical charge capacity of a battery. Essentially, it indicates how much current the power bank can deliver over a certain period of time. A higher mAh value means the power bank can store more energy and provide more charges to your devices before needing to be recharged itself. [1 <https://www.evolutionwear.co/blogs/news/how-long-will-a-10000mah-power-bank-last#:~:text=mAh%20stands%20for%20milliampere%2Dhour%2C%20a%20unit%20that,one%20hour%20or%201000mA%20for%20ten%20hours.> , 2 <https://xyztech.com/blogs/power-bank/what-is-mah-in-power-banks-choosing-your-ideal-mah-capacity> ] Here's a more detailed explanation: * What it means: mAh quantifies the amount of electrical charge a battery can hold. A higher mAh value means the battery can store more energy. [2 <https://xyztech.com/blogs/power-bank/what-is-mah-in-power-banks-choosing-your-ideal-mah-capacity> , 2 <https://xyztech.com/blogs/power-bank/what-is-mah-in-power-banks-choosing-your-ideal-mah-capacity> , 3 <https://chargetech.com/blogs/blog/how-much-power-bank-mah-do-i-need#:~:text=Like%20we%20have%20mentioned%20in%20a%20previous,has%20to%20keep%20charging%20your%20mobile%20devices.> , 3 <https://chargetech.com/blogs/blog/how-much-power-bank-mah-do-i-need#:~:text=Like%20we%20have%20mentioned%20in%20a%20previous,has%20to%20keep%20charging%20your%20mobile%20devices.> ] * How it relates to power banks: A power bank with a higher mAh rating can charge your devices more times or for a longer duration compared to a power bank with a lower mAh rating. [2 <https://xyztech.com/blogs/power-bank/what-is-mah-in-power-banks-choosing-your-ideal-mah-capacity> , 2 <https://xyztech.com/blogs/power-bank/what-is-mah-in-power-banks-choosing-your-ideal-mah-capacity> , 4 <https://www.baseus.com/blogs/content/what-is-mah-a-guide-to-power-banks> , 4 <https://www.baseus.com/blogs/content/what-is-mah-a-guide-to-power-banks> ] * Example: A 10,000 mAh power bank can theoretically deliver 10,000mA of current for one hour, or 1,000mA for ten hours. [1 <https://www.evolutionwear.co/blogs/news/how-long-will-a-10000mah-power-bank-last#:~:text=mAh%20stands%20for%20milliampere%2Dhour%2C%20a%20unit%20that,one%20hour%20or%201000mA%20for%20ten%20hours.> , 1 <https://www.evolutionwear.co/blogs/news/how-long-will-a-10000mah-power-bank-last#:~:text=mAh%20stands%20for%20milliampere%2Dhour%2C%20a%20unit%20that,one%20hour%20or%201000mA%20for%20ten%20hours.> ] * Factors influencing actual performance: While mAh indicates capacity, the actual number of charges a power bank can provide depends on factors like the voltage of the devices being charged, the efficiency of the power bank and the charging speed. [5 <https://www.anker.com/blogs/chargers/what-is-mah-milliamp-hours-and-how-does-it-affect-chargers> , 5 <https://www.anker.com/blogs/chargers/what-is-mah-milliamp-hours-and-how-does-it-affect-chargers> , 6 <https://uk.ugreen.com/blogs/power-bank/what-does-mah-mean-on-a-battery> , 6 <https://uk.ugreen.com/blogs/power-bank/what-does-mah-mean-on-a-battery> , 7 <https://www.vrurcpower.com/blogs/tips/what-does-mah-mean-in-battery-or-power-bank> , 8 <https://blog.ecoflow.com/us/is-20000-mah-power-bank-too-much/#:~:text=A%2020%2C000mAh%20power%20bank%20has%20a%20storage,the%20actual%20usable%20capacity%20is%20slightly%20lower.> ] * Choosing the right mAh: Consider how often you'll need to charge your devices and the capacity of their batteries when choosing a power bank. For example, a 10,000 mAh power bank is generally good for a few charges of a smartphone. [9 <https://www.ugreen.com/blogs/power-bank/what-is-mah#:~:text=Use%20the%20Formula%20for%20Estimation%20You%20can,mAh%20=%203%2C000mAh%20%C3%97%202%20=%206%2C000mAh.> , 9 <https://www.ugreen.com/blogs/power-bank/what-is-mah#:~:text=Use%20the%20Formula%20for%20Estimation%20You%20can,mAh%20=%203%2C000mAh%20%C3%97%202%20=%206%2C000mAh.> , 10 <https://www.choice.com.au/electronics-and-technology/phones/mobile-phones/buying-guides/power-banks#:~:text=Considering%20most%20modern%20smartphones%20have%20a%20battery,can%20provide%20more%20than%20six%20full%20charges.> , 10 <https://www.choice.com.au/electronics-and-technology/phones/mobile-phones/buying-guides/power-banks#:~:text=Considering%20most%20modern%20smartphones%20have%20a%20battery,can%20provide%20more%20than%20six%20full%20charges.> ] AI responses may include mistakes. [1] https://www.evolutionwear.co/blogs/news/how-long-will-a-10000mah-power-bank-last <https://www.evolutionwear.co/blogs/news/how-long-will-a-10000mah-power-bank-last#:~:text=mAh%20stands%20for%20milliampere%2Dhour%2C%20a%20unit%20that,one%20hour%20or%201000mA%20for%20ten%20hours.> [2] https://xyztech.com/blogs/power-bank/what-is-mah-in-power-banks-choosing-your-ideal-mah-capacity [3] https://chargetech.com/blogs/blog/how-much-power-bank-mah-do-i-need <https://chargetech.com/blogs/blog/how-much-power-bank-mah-do-i-need#:~:text=Like%20we%20have%20mentioned%20in%20a%20previous,has%20to%20keep%20charging%20your%20mobile%20devices.> [4] https://www.baseus.com/blogs/content/what-is-mah-a-guide-to-power-banks [5] https://www.anker.com/blogs/chargers/what-is-mah-milliamp-hours-and-how-does-it-affect-chargers [6] https://uk.ugreen.com/blogs/power-bank/what-does-mah-mean-on-a-battery [7] https://www.vrurcpower.com/blogs/tips/what-does-mah-mean-in-battery-or-power-bank [8] https://blog.ecoflow.com/us/is-20000-mah-power-bank-too-much/ <https://blog.ecoflow.com/us/is-20000-mah-power-bank-too-much/#:~:text=A%2020%2C000mAh%20power%20bank%20has%20a%20storage,the%20actual%20usable%20capacity%20is%20slightly%20lower.> [9] https://www.ugreen.com/blogs/power-bank/what-is-mah <https://www.ugreen.com/blogs/power-bank/what-is-mah#:~:text=Use%20the%20Formula%20for%20Estimation%20You%20can,mAh%20=%203%2C000mAh%20%C3%97%202%20=%206%2C000mAh.> [10] https://www.choice.com.au/electronics-and-technology/phones/mobile-phones/buying-guides/power-banks <https://www.choice.com.au/electronics-and-technology/phones/mobile-phones/buying-guides/power-banks#:~:text=Considering%20most%20modern%20smartphones%20have%20a%20battery,can%20provide%20more%20than%20six%20full%20charges.> From: viphone@googlegroups.com <viphone@googlegroups.com> On Behalf Of Barbara Stahl Sent: Saturday, July 5, 2025 11:11 PM To: Viphone <viphone@googlegroups.com> Subject: Portable Iphone charging power bank. Hi list! I am considering purchasing a portable charging power bank for my iphone. I thought that it might be a good idea to have something like this for times when a storm or something knocks out the power. Can anyone tell me the difference between the chargers that say 10,000 Milliamp hours and the ones that say 20,000 Milliamp hours? Does it concern charging time or number of charges? -- The following information is important for all members of the V iPhone list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your V iPhone list moderator is Mark Taylor. Mark can be reached at: mk...@ucla.edu <mailto:mk...@ucla.edu> . 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If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your V iPhone list moderator is Mark Taylor. Mark can be reached at: mk...@ucla.edu. Your list owner is Cara Quinn - you can reach Cara at caraqu...@caraquinn.com The archives for this list can be searched at: http://www.mail-archive.com/viphone@googlegroups.com/ --- You received this message because you are subscribed to the Google Groups "VIPhone" group. To unsubscribe from this group and stop receiving emails from it, send an email to viphone+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/viphone/002201dbee8c%24164eb290%2442ec17b0%24%40gmail.com.
