No. Using a different brand's 20V battery with your DeWalt DCD771 drill will damage the tool and battery, and creates a serious risk of fire and injury.
- Use only DeWalt rechargeable battery packs specifically designated for this tool.
- Chargers and battery packs are designed to work together.
- Using another brand's battery pack may cause it to overheat and burst.
- Do not modify the battery pack in any way to fit.
HEADS UP: When the battery pack is not in use, keep it away from other metal objects like paper clips, coins, keys, nails, or screws. These can short the battery terminals together, causing burns or a fire.