測試公式
1，測定電池的開路電壓。
2，加負載，測定電池的負載電壓。和電池的負載電流。
3，內阻=(電池的開路電壓-電池的負載電壓)/電池的負載電流
內阻測試儀
內阻測試如果你是測試蓄電池內阻，就必須使用行業標準的測試儀器。深圳市派司德科技推出的BSB-616內阻測試儀必然是首選。可以測試UPS蓄電池，閥控鉛酸蓄電池，發電機及汽車啟動蓄電池等。
測試標準
| 序號 | 容量 | 電壓 | 內阻值 | 序號 | 容量 | 電壓 | 內阻值 | |
| 1 | 0.8AH | 12V | 120.00 | 33 | 150AH | 12V | 4.00 | |
| 2 | 1.3AH | 12V | 102.00 | 34 | 200AH | 12V | 3.00 | |
| 3 | 2.2AH | 12V | 63.70 | 35 | 230AH | 12V | 2.00 | |
| 4 | 3.3AH | 12V | 55.70 | 36 | 250AH | 12V | 1.00 | |
| 5 | 4.0AH | 12V | 46.90 | 37 | 1.3AH | 6V | 55.00 | |
| 6 | 5AH | 12V | 37.40 | 38 | 2.8AH | 6V | 40.00 | |
| 7 | 6AH | 12V | 30.20 | 39 | 3.2AH | 6V | 28.50 | |
| 8 | 7AH | 12V | 23.00 | 40 | 4AH | 6V | 24.00 | |
| 9 | 8AH | 12V | 20.00 | 41 | 5AH | 6V | 18.30 | |
| 10 | 9AH | 12V | 19.00 | 42 | 7AH | 6V | 14.00 | |
| 11 | 10AH | 12V | 18.70 | 43 | 10AH | 6V | 12.00 | |
| 12 | 12AH | 12V | 14.40 | 44 | 110AH | 6V | 4.30 | |
| 13 | 14AH | 12V | 13.60 | 45 | 200AH | 6V | 1.70 | |
| 14 | 15AH | 12V | 13.00 | 46 | 100AH | 2V | 1.00 | |
| 15 | 17AH | 12V | 12.10 | 47 | 150AH | 2V | 0.83 | |
| 16 | 18AH | 12V | 11.40 | 48 | 170AH | 2V | 0.76 | |
| 17 | 20AH | 12V | 10.60 | 49 | 200AH | 2V | 0.70 | |
| 18 | 24AH | 12V | 9.80 | 50 | 250AH | 2V | 0.68 | |
| 19 | 25AH | 12V | 9.50 | 51 | 300AH | 2V | 0.65 | |
| 20 | 26AH | 12V | 9.20 | 52 | 350AH | 2V | 0.60 | |
| 21 | 28AH | 12V | 8.90 | 53 | 400AH | 2V | 0.50 | |
| 22 | 31AH | 12V | 8.60 | 54 | 420AH | 2V | 0.48 | |
| 23 | 33AH | 12V | 8.40 | 55 | 450AH | 2V | 0.45 | |
| 24 | 38AH | 12V | 8.20 | 56 | 462AH | 2V | 0.43 | |
| 25 | 40AH | 12V | 7.90 | 57 | 500AH | 2V | 0.40 | |
| 26 | 60AH | 12V | 6.50 | 58 | 600AH | 2V | 0.32 | |
| 27 | 65AH | 12V | 5.80 | 59 | 800AH | 2V | 0.24 | |
| 28 | 75AH | 12V | 5.50 | 60 | 1000AH | 2V | 0.20 | |
| 29 | 80AH | 12V | 5.30 | 61 | 1500AH | 2V | 0.16 | |
| 30 | 85AH | 12V | 5.00 | 62 | 2000AH | 2V | 0.12 | |
| 31 | 100AH | 12V | 4.50 | 63 | 3000AH | 2V | 0.11 | |
| 32 | 120AH | 12V | 4.30 |
