For the Lenovo Tab 4 series (8 and 8 Plus models, specifically TB-8504N,TB-8504X,TB-8504FTB-8704F,TB-8704X, and TB-8704N), the compatible battery model is the L16D1P34. Thisbattery typically has a capacity around 4850mAh, which should provide a good amount ofusage time.

When looking for a replacement battery, make sure to:1. Verify the seller's authenticity if buying online to ensure you get a genuine Lenovobattery.

2. Check for warranty or return policies.

3. Confirm compatibility with your specific Tab 4 model to avoid fitment issues.

Let me know if you need further guidance on installing the battery or finding a reliablesource!