Okay if you are a Tecno User, this would be useful for you. I came across this article and i think it might be useful for you
In case you might be wondering whether your Tecno Batter is fake, Take note of the following:

A Genuine Tecno Battery carries the product name TECNO Mate BL-5CAT, it comes with a 1150mAh battery capacity. It is compatible with the following models: HD70/TV20/TV30/TV40/TV65/T20/T209/T21/T25/T281/T30/T330/T331/T35/T351/T36/T380/T381/T390/T421/T451/T471/T481/T50/T510/T505/T506/T511/T511/T530/T531/T551/T604/T607/T608/T638/T342/T341/T384/T526/T33/T340/T345/T346/T605
Some of the features includes:
1. 45℃ high temperature standing test, ensuring every battery's good quality.
2. low pressure modeling makes every batter with high capacity.
3. Top-class battery cell with effective circuit protection
4. No memory effect, long-lasting, supporting fast charging, repeated charging.
5. 72 hours aging test: every TECNO Mate battery has had 72 hors aging test, guarantee its stable quality.

You can use the following method to identify its authenticity once you purchase the battery.

1. Once you purchase the battery, Scan the QR code on the back of the battery to check for its authenticity
2. A notification is sent to you to show that the Battery is Genuine
3. If it shows the following "caution", it means the battery is fake

Recently, fake battery is increasing rapidly, resulting in frequent battery explosion that burns the phone or even causes casualties. Therefore, for safety issue, please purchase a GENUINE Tecno battery.