Home Uncategorized What’s Wrong With This Picture? Uncategorized What’s Wrong With This Picture? By Doug Simmons - March 25, 2010 70 8 Share on Facebook Tweet on Twitter Doug Simmons RELATED ARTICLESMORE FROM AUTHOR Uncategorized Review of FSL Reflex Bluetooth Sports Earbuds Uncategorized When should I upgrade my phone? Uncategorized iOS vs Android – 2015 Edition Uncategorized Review of Maxway 12000mAh Portable Power Bank Uncategorized Review of Bluetooth Talk n’ Walk Headphones Uncategorized Review of WAVEstream Universal Portable Wireless Speaker Bluetooth Sound Bar 8 COMMENTS 3000 mah wrapper on a 1200 mah battery? you know, htc will send you a free battery if you call and ask. :P damn the battery scams 2 Batteries paralell = 2400 mAh […] […] […] first to find these extended batteries not up to what they make out to be. Yes, look at this … What’s Wrong With This Picture? Harry __________________ Google Translator is to blame for my […] Errrrr…? Google Translator? […] some info BatteryBoss Calls Out False Capacity Claims! What’s Wrong With This Picture? Harry __________________ Google Translator is to blame for my […] Just wondering why they are using unprotected cells? Was there ANY circuitry at all in the casing? Paralleling two batteries can yield more than twice the total capacity, I’m not sure a 30% uprating is or isn’t deserved in the pictured case, I tend think something closer to 10% is more likely if the 1200 mAh was for something close to the actual load the phone is for the battery. There is also a (big) problem charging paralleled stacks of cells as they age. The mAh rating of a battery depends on both the battery’s capacity and resistance AND the tested rate of discharge and cutoff voltage. For many battery types the tested cell capacity in total mAh at a 10 hour discharge rate is far greater than at a 1 hour discharge rate. There’s a lot of data publicly available from several manufacturers for 12v 7AH lead acid batteries for emergency lighting, UPS, etc. some have a nearly complete graph of total capacity vs rate of discharge curve. there aren’t as many chemistry variations available for other battery types, but you appreciate why 1200mAH + 1200mAH > 2400mAH Comments are closed.